成考院校在线答案
- 2022-09-12 [单选] <p class="MsoNormal">24、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">随机变量</span><span lang="EN-US" style="font-size:12.0pt">X</span><span style="font-size:12.0pt; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">、</span><span lang="EN-US" style="font-size:12.0pt">Y</span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">相互独立，且</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative;top:12.0pt; mso-text-raise:-12.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1101" type="#_x0000_t75" style='width:139.8pt;height:30.6pt' o:ole=""> <v:imagedata src="xxdsb07.files/image118.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="186" height="41" v:shapes="_x0000_i1101" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image119.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1101" DrawAspect="Content" ObjectID="_1604819016"> </o:OLEObject> </xml><![endif]--><span style="mso-spacerun:yes"> </span><span style="position:relative;top:7.0pt;mso-text-raise:-7.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1102" type="#_x0000_t75" style='width:82.8pt;height:20.4pt' o:ole=""> <v:imagedata src="xxdsb07.files/image120.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="110" height="27" v:shapes="_x0000_i1102" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image121.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1102" DrawAspect="Content" ObjectID="_1604819017"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal">5、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">设</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:5.0pt;mso-text-raise:-5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1090" type="#_x0000_t75" style='width:27pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb07.files/image107.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="36" height="21" v:shapes="_x0000_i1090" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image108.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1090" DrawAspect="Content" ObjectID="_1604819005"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">为随机变量</span><span lang="EN-US" style="font-size:12.0pt">X</span><span style="font-size:12.0pt; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">的分布函数，则（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal">4、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">设连续型随机变量</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:2.0pt;mso-text-raise:-2.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1109" type="#_x0000_t75" style='width:14.4pt;height:12.6pt' o:ole=""> <v:imagedata src="xxdsb08.files/image120.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="19" height="17" v:shapes="_x0000_i1109" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image127.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1109" DrawAspect="Content" ObjectID="_1604819064"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">的概率密度为</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:22.0pt;mso-text-raise:-22.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1110" type="#_x0000_t75" style='width:102pt;height:50.4pt' o:ole=""> <v:imagedata src="xxdsb08.files/image152.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="136" height="67" v:shapes="_x0000_i1110" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image153.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1110" DrawAspect="Content" ObjectID="_1604819065"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">则</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:5.0pt;mso-text-raise:-5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1111" type="#_x0000_t75" style='width:74.4pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb08.files/image154.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="99" height="21" v:shapes="_x0000_i1111" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image155.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1111" DrawAspect="Content" ObjectID="_1604819066"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal">1、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">设随机变量</span><span lang="EN-US" style="font-size:12.0pt">X</span><span style="font-size:12.0pt; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">的分布函数为</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative;top:5.0pt;mso-text-raise:-5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1107" type="#_x0000_t75" style='width:27pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb07.files/image130.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="36" height="21" v:shapes="_x0000_i1107" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image108.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1107" DrawAspect="Content" ObjectID="_1604819022"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">，下列结论中不一定成立的是（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] 28、已知4阶行列式中第1行元依次是-4,0,1,3, 第3行元的余子式依次为-2,5,1,x ,则X=<br>
- 2022-09-12 [单选] <p class="MsoNormal">8、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";mso-font-kerning: 0pt">设</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative;top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1348" type="#_x0000_t75" style='width:121.8pt;height:19.2pt' o:ole=""> <v:imagedata src="xxds04.files/image447.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="162" height="26" v:shapes="_x0000_i1348" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image448.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1348" DrawAspect="Content" ObjectID="_1604819129"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">是三阶方阵的三个特征值，对应特征向量分别为</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1349" type="#_x0000_t75" style='width:46.2pt;height:19.2pt' o:ole=""> <v:imagedata src="xxds04.files/image449.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="62" height="26" v:shapes="_x0000_i1349" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image450.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1349" DrawAspect="Content" ObjectID="_1604819130"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">，且存在可逆矩阵</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:2.0pt;mso-text-raise:-2.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1350" type="#_x0000_t75" style='width:12.6pt;height:13.8pt' o:ole=""> <v:imagedata src="xxds04.files/image451.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="17" height="18" v:shapes="_x0000_i1350" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image452.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1350" DrawAspect="Content" ObjectID="_1604819131"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">，使得</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:2.0pt;mso-text-raise:-2.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1351" type="#_x0000_t75" style='width:40.2pt;height:16.8pt' o:ole=""> <v:imagedata src="xxds04.files/image453.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="54" height="22" v:shapes="_x0000_i1351" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image390.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1351" DrawAspect="Content" ObjectID="_1604819132"> </o:OLEObject> </xml><![endif]--><span style="position:relative;top:28.0pt;mso-text-raise: -28.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1352" type="#_x0000_t75" style='width:88.2pt;height:63pt' o:ole=""> <v:imagedata src="xxds04.files/image454.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="118" height="84" v:shapes="_x0000_i1352" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image455.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1352" DrawAspect="Content" ObjectID="_1604819133"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">，则</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:2.0pt;mso-text-raise:-2.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1353" type="#_x0000_t75" style='width:24pt;height:13.8pt' o:ole=""> <v:imagedata src="xxds04.files/image456.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="32" height="18" v:shapes="_x0000_i1353" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image457.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1353" DrawAspect="Content" ObjectID="_1604819134"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span></p>
- 2022-09-12 [单选] <p class="MsoNormal">12、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";mso-font-kerning: 0pt">下列二次型中，矩阵为</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative;top:28.0pt;mso-text-raise:-28.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1187" type="#_x0000_t75" style='width:76.8pt;height:63pt' o:ole=""> <v:imagedata src="xxds05.files/image202.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="102" height="84" v:shapes="_x0000_i1187" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image203.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1187" DrawAspect="Content" ObjectID="_1604818997"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">的是（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span></p>
- 2022-09-12 [单选] <p class="MsoNormal">13、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman"">设随机变量</span><span lang="EN-US" style="font-size:12.0pt; mso-hansi-font-family:宋体">X</span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman"">的概率密度为</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative;top:5.0pt;mso-text-raise: -5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1084" type="#_x0000_t75" style='width:131.4pt;height:20.4pt' o:ole=""> <v:imagedata src="xxdsb07.files/image095.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="175" height="27" v:shapes="_x0000_i1084" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image096.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1084" DrawAspect="Content" ObjectID="_1604818999"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">，则常数</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:3.0pt;mso-text-raise:-3.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1085" type="#_x0000_t75" style='width:9pt;height:11.4pt' o:ole=""> <v:imagedata src="xxdsb07.files/image097.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="12" height="15" v:shapes="_x0000_i1085" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image098.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1085" DrawAspect="Content" ObjectID="_1604819000"> </o:OLEObject> </xml><![endif]-->=</span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal">36、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">设随机变量</span><span lang="EN-US" style="font-size:12.0pt">X</span><span style="font-size:12.0pt; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">和</span><span lang="EN-US" style="font-size:12.0pt">Y</span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">相互独立，且</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative;top:5.0pt;mso-text-raise: -5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1061" type="#_x0000_t75" style='width:98.4pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb09.files/image065.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="131" height="21" v:shapes="_x0000_i1061" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image066.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1061" DrawAspect="Content" ObjectID="_1604819134"> </o:OLEObject> </xml><![endif]--><span style="mso-spacerun:yes"> </span><span style="position:relative;top:5.0pt;mso-text-raise:-5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1062" type="#_x0000_t75" style='width:59.4pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb09.files/image067.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="79" height="21" v:shapes="_x0000_i1062" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image068.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1062" DrawAspect="Content" ObjectID="_1604819135"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal">15、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">随机变量</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:5.0pt;mso-text-raise:-5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1042" type="#_x0000_t75" style='width:9.6pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb08.files/image035.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="13" height="21" v:shapes="_x0000_i1042" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image036.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1042" DrawAspect="Content" ObjectID="_1604818997"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">的概率密度</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:16.0pt;mso-text-raise:-16.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1043" type="#_x0000_t75" style='width:99pt;height:37.8pt' o:ole=""> <v:imagedata src="xxdsb08.files/image037.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="132" height="50" v:shapes="_x0000_i1043" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image038.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1043" DrawAspect="Content" ObjectID="_1604818998"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">则常数</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:3.0pt;mso-text-raise:-3.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1044" type="#_x0000_t75" style='width:21.6pt;height:14.4pt' o:ole=""> <v:imagedata src="xxdsb08.files/image039.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="29" height="19" v:shapes="_x0000_i1044" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image040.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1044" DrawAspect="Content" ObjectID="_1604818999"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>