【单选题】
设<imgwidth="16"height="20"v:shapes="_x0000_i1143"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image129.png">是可逆矩阵<imgwidth="18"height="18"v:shapes="_x0000_i1144"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image091.png">的一个特征值,则<imgwidth="18"height="18"v:shapes="_x0000_i1145"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image091.png">的伴随矩阵<imgwidth="22"height="22"v:shapes="_x0000_i1146"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image131.png">必有一个特征值为()
①
<imgwidth="78"height="48"v:shapes="_x0000_i1147"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image133.png">
②
<imgwidth="58"height="48"v:shapes="_x0000_i1148"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image135.png">
③
<imgwidth="56"height="20"v:shapes="_x0000_i1149"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image137.png">
④
<imgwidth="74"height="32"v:shapes="_x0000_i1150"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image139.png">
【单选题】
设随机变量X的方差<imgwidth="144"height="25"v:shapes="_x0000_i1025"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image002.png">,则X的数学期望<imgwidth="54"height="21"v:shapes="_x0000_i1026"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image004.png">()
④
<imgwidth="33"height="25"v:shapes="_x0000_i1027"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image006.png">
【单选题】
随机变量<imgwidth="13"height="21"v:shapes="_x0000_i1042"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image036.png">的概率密度<imgwidth="132"height="50"v:shapes="_x0000_i1043"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image038.png">则常数<imgwidth="29"height="19"v:shapes="_x0000_i1044"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image040.png">()
③
<imgwidth="17"height="41"v:shapes="_x0000_i1045"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image042.png">
④
<imgwidth="17"height="41"v:shapes="_x0000_i1046"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image044.png">
【单选题】
非齐次线性方程组<imgwidth="186"height="58"v:shapes="_x0000_i1165"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image192.png">有解的充要条件是()
①
<imgwidth="52"height="48"v:shapes="_x0000_i1166"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image194.png">
②
<imgwidth="52"height="48"v:shapes="_x0000_i1167"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image196.png">
④
<imgwidth="14"height="20"v:shapes="_x0000_i1168"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image198.png">任意非零实数
【单选题】
<imgwidth="210"height="114"v:shapes="图片_x0020_8"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image008.png">
①
<imgwidth="59"height="28"v:shapes="图片_x0020_9"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image009.png">
②
<imgwidth="77"height="40"v:shapes="图片_x0020_10"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image010.png">
③
<imgwidth="57"height="37"v:shapes="图片_x0020_11"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image011.png">
④
<imgwidth="40"height="38"v:shapes="图片_x0020_12"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image012.png">
【单选题】
在假设检验中,关于两个正态总体方差的检验,检验采用的方法为()
①
<imgwidth="12"height="18"v:shapes="_x0000_i1342"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image452.png">检验法
②
<imgwidth="12"height="18"v:shapes="_x0000_i1343"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image454.png">检验法
③
<imgwidth="21"height="25"v:shapes="_x0000_i1344"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image456.png">检验法
④
<imgwidth="21"height="25"v:shapes="_x0000_i1345"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image456.png">检验法
【单选题】
<imgwidth="13"height="21"v:shapes="_x0000_i1174"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image254.png">与<imgwidth="13"height="17"v:shapes="_x0000_i1175"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image256.png">的相关系数<imgwidth="50"height="26"v:shapes="_x0000_i1176"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image258.png">,表示<imgwidth="13"height="21"v:shapes="_x0000_i1177"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image254.png">与<imgwidth="13"height="17"v:shapes="_x0000_i1178"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image256.png">()
③
存在常数<imgwidth="27"height="21"v:shapes="_x0000_i1179"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image260.png">使<imgwidth="116"height="27"v:shapes="_x0000_i1180"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image262.png">
④
满足<imgwidth="164"height="29"v:shapes="_x0000_i1181"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image264.png">
【单选题】
设<imgwidth="14"height="16"v:shapes="_x0000_i1136"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image002.png">阶可逆矩阵<imgwidth="18"height="18"v:shapes="_x0000_i1137"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image091.png">有一个特征值为2,对应的特征向量为<imgwidth="14"height="16"v:shapes="_x0000_i1138"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image120.png">,则下列等式中不正确的是()
①
<imgwidth="64"height="20"v:shapes="_x0000_i1139"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image122.png">
②
<imgwidth="80"height="46"v:shapes="_x0000_i1140"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image124.png">
③
<imgwidth="76"height="24"v:shapes="_x0000_i1141"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image126.png">
④
<imgwidth="70"height="24"v:shapes="_x0000_i1142"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image128.png">
【单选题】
已知<imgwidth="92"height="26"v:shapes="_x0000_i1152"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image174.png">线性无关则()
①
<imgwidth="208"height="26"v:shapes="_x0000_i1153"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image176.png">必线性无关
②
若<imgwidth="14"height="14"v:shapes="_x0000_i1154"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image178.png">为奇数,则必有<imgwidth="266"height="26"v:shapes="_x0000_i1155"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image180.png">线性无关
③
若<imgwidth="14"height="14"v:shapes="_x0000_i1156"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image178.png">为偶数,则<imgwidth="266"height="26"v:shapes="_x0000_i1157"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image180.png">线性无关
【单选题】
设离散的随机变量X的分布为<imgwidth="222"height="27"v:shapes="_x0000_i1155"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image211.png">则<imgwidth="27"height="19"v:shapes="_x0000_i1156"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image213.png">()
①
<imgwidth="32"height="19"v:shapes="_x0000_i1157"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image215.png">
③
<imgwidth="35"height="41"v:shapes="_x0000_i1158"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image217.png">
④
<imgwidth="35"height="41"v:shapes="_x0000_i1159"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image219.png">