【单选题】
设向量组<imgwidth="126"height="28"v:shapes="_x0000_i1113"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image136.png">的秩为<imgwidth="14"height="14"v:shapes="_x0000_i1114"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image138.png">,且<imgwidth="46"height="16"v:shapes="_x0000_i1115"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image140.png">,则以下结论中正确的是()
①
<imgwidth="26"height="28"v:shapes="_x0000_i1116"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">中必有<imgwidth="14"height="14"v:shapes="_x0000_i1117"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image138.png">个向量线性无关,且<imgwidth="26"height="28"v:shapes="_x0000_i1118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">中任意<imgwidth="36"height="18"v:shapes="_x0000_i1119"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image142.png">个向量都线性相关
②
<imgwidth="26"height="28"v:shapes="_x0000_i1120"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">中任意<imgwidth="14"height="14"v:shapes="_x0000_i1121"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image138.png">个向量都线性相关
③
<imgwidth="26"height="28"v:shapes="_x0000_i1122"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">中任意<imgwidth="14"height="14"v:shapes="_x0000_i1123"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image138.png">个向量都是<imgwidth="26"height="28"v:shapes="_x0000_i1124"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">的最大无关组
④
<imgwidth="26"height="28"v:shapes="_x0000_i1125"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image143.png">中任意一个向量都可由该组中其他任意<imgwidth="14"height="14"v:shapes="_x0000_i1126"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image144.png">个向量线性表示
【单选题】
<imgwidth="487"height="37"v:shapes="图片_x0020_162"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image168.png">
【单选题】
<imgwidth="254"height="27"v:shapes="图片_x0020_196"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image195.png">
①
<imgwidth="67"height="32"v:shapes="图片_x0020_197"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image196.png">
②
<imgwidth="19"height="22"v:shapes="图片_x0020_198"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image197.png">
③
<imgwidth="84"height="36"v:shapes="图片_x0020_199"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image198.png">
④
<imgwidth="97"height="34"v:shapes="图片_x0020_200"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image199.png">
【单选题】
<imgwidth="234"height="33"v:shapes="图片_x0020_116"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image114.png">
①
<imgwidth="237"height="34"v:shapes="图片_x0020_117"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image115.png">
②
<imgwidth="66"height="25"v:shapes="图片_x0020_118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image116.png">
③
<imgwidth="249"height="21"v:shapes="图片_x0020_119"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image117.png">
④
<imgwidth="201"height="27"v:shapes="图片_x0020_120"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image118.png">
【单选题】
<imgwidth="538"height="87"v:shapes="图片_x0020_1"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image244.jpg">
【单选题】
若方程组<imgwidth="166"height="58"v:shapes="_x0000_i1174"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image210.png">(系数均不为零)的基础解系含有两个解向量,则()
①
<imgwidth="86"height="58"v:shapes="_x0000_i1175"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image212.png">
②
<imgwidth="86"height="58"v:shapes="_x0000_i1176"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image214.png">
③
<imgwidth="122"height="28"v:shapes="_x0000_i1177"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image216.png">
④
<imgwidth="98"height="52"v:shapes="_x0000_i1178"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image218.png">
【单选题】
二次型<imgwidth="246"height="28"v:shapes="_x0000_i1258"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image271.png">标准型为()
①
<imgwidth="126"height="46"v:shapes="_x0000_i1259"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image273.png">
②
<imgwidth="126"height="46"v:shapes="_x0000_i1260"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image275.png">
③
<imgwidth="122"height="28"v:shapes="_x0000_i1261"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image277.png">
④
<imgwidth="130"height="46"v:shapes="_x0000_i1262"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image279.png">
【单选题】
设<imgwidth="44"height="46"v:shapes="_x0000_i1079"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image054.png">是二阶矩阵<imgwidth="18"height="18"v:shapes="_x0000_i1080"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image004.png">的两个特征,那么它的特征方程是()
①
<imgwidth="118"height="46"v:shapes="_x0000_i1081"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image056.png">
②
<imgwidth="122"height="24"v:shapes="_x0000_i1082"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image058.png">
③
<imgwidth="118"height="46"v:shapes="_x0000_i1083"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image060.png">
④
<imgwidth="122"height="24"v:shapes="_x0000_i1084"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image062.png">
【单选题】
若总体为正态分布,方差未知,检验<imgwidth="73"height="22"v:shapes="_x0000_i1436"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image583.png">,对<imgwidth="73"height="22"v:shapes="_x0000_i1437"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image585.png">抽取样本<imgwidth="78"height="22"v:shapes="_x0000_i1438"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image587.png">,则拒绝域仅与()有关
②
样本值,显著水平,样本容量<imgwidth="12"height="12"v:shapes="_x0000_i1439"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image589.png">
③
样本值,样本容量<imgwidth="12"height="12"v:shapes="_x0000_i1440"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image589.png">
④
显著水平,样本容量<imgwidth="12"height="12"v:shapes="_x0000_i1441"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image589.png">
【单选题】
C至少有1个发生的概率为()
①
<imgwidth="15"height="41"v:shapes="_x0000_i1054"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image060.png">
②
<imgwidth="15"height="41"v:shapes="_x0000_i1055"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image062.png">
③
<imgwidth="16"height="41"v:shapes="_x0000_i1056"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image064.png">
④
<imgwidth="15"height="41"v:shapes="_x0000_i1057"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image066.png">