<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>为<img class=jc-formula data-tex=n src=https://huaweicloudobs.ahjxjy.cn/6593C84B94B8062EB35F270378D7D9B6.png style=vertical-align: middle;/>阶矩阵，<img class=jc-formula data-tex={ A }^{ T } src=https://huaweicloudobs.ahjxjy.cn/178232F88F2C6F03375305FE1EDCE58E.png style=vertical-align: middle;/>与<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>的特征值相同.

【判断题】【消耗次数：1】

① 正确

② 错误

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【判断题】 <img class=jc-formula data-tex=n src=https://huaweicloudobs.ahjxjy.cn/6593C84B94B8062EB35F270378D7D9B6.png style=vertical-align: middle;/>阶矩阵<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>与<img class=jc-formula data-tex={ A }^{ T } src=https://huaweicloudobs.ahjxjy.cn/178232F88F2C6F03375305FE1EDCE58E.png style=vertical-align: middle;/>的特征向量一定相同.

① 正确

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【判断题】 n阶矩阵<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>与<img class=jc-formula data-tex={ A }^{ T } src=https://huaweicloudobs.ahjxjy.cn/178232F88F2C6F03375305FE1EDCE58E.png style=vertical-align: middle;/>的特征值相同.

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【判断题】若<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>满足<img class=jc-formula data-tex={ A }^{ 2 }+3A+E=0 src=https://huaweicloudobs.ahjxjy.cn/E01BEBC90E4EF538771A71269C30D278.png style=vertical-align: middle;/>,则<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>可逆.

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【单选题】设<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>是4×3矩阵，若齐次线性方程组<img class=jc-formula data-tex=AX=0 src=https://huaweicloudobs.ahjxjy.cn/CEC806624F9D642E698219EC94F94B3E.png style=vertical-align: middle;/>只有零解，则矩阵<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>的秩为[填空].

① 1

② 2

③ 3

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【判断题】若矩阵<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>与<img class=jc-formula data-tex=B src=https://huaweicloudobs.ahjxjy.cn/4CEB8696C01DCD0803D103905D21BDE4.png style=vertical-align: middle;/>等价，则<img class=jc-formula data-tex=R(A)=R(B) src=https://huaweicloudobs.ahjxjy.cn/93F794F7745AE70AA12AE6F12B6EAF2B.png style=vertical-align: middle;/>.

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【判断题】设<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>为<img class=jc-formula data-tex=n src=https://huaweicloudobs.ahjxjy.cn/6593C84B94B8062EB35F270378D7D9B6.png style=vertical-align: middle;/>级方阵:<img class=jc-formula data-tex=\left| A \right| =2, src=https://huaweicloudobs.ahjxjy.cn/17D6EE8CCAAA42B2763D770A0A43553E.png style=vertical-align: middle;/>，则<img class=jc-formula data-tex=\left| -3A \right| =-6 src=https://huaweicloudobs.ahjxjy.cn/544065F165236539FDB8075DE4538205.png style=vertical-align: middle;/>.

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【单选题】令前提: <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />xF(x)<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto /> <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/151E88A53D653382F547CC2EA5D9CEBC.png data-tex=\forall />y((F(y)<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/7BA9C8923F2F9C5684519175C6A722C4.png data-tex=\vee /> G(y))<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto /> R(y)), <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />xF(x)，则下面不是其有效结论的是：

① <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />xR(x)

② <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/151E88A53D653382F547CC2EA5D9CEBC.png data-tex=\forall />y((F(y) <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/7BA9C8923F2F9C5684519175C6A722C4.png data-tex=\vee /> G(y))<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto /> R(y))

③ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />x(F(x)<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/7BA9C8923F2F9C5684519175C6A722C4.png data-tex=\vee /> G(x))

④ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/151E88A53D653382F547CC2EA5D9CEBC.png data-tex=\forall />x(F(x)<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/7BA9C8923F2F9C5684519175C6A722C4.png data-tex=\vee /> G(x))

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【判断题】 <img class=jc-formula data-tex=n src=https://huaweicloudobs.ahjxjy.cn/6593C84B94B8062EB35F270378D7D9B6.png style=vertical-align: middle;/>阶方阵<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>的两个不相等的特征值可能对应相同的特征向量

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【判断题】如果 <img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>,<img class=jc-formula data-tex=B src=https://huaweicloudobs.ahjxjy.cn/4CEB8696C01DCD0803D103905D21BDE4.png style=vertical-align: middle;/>,<img class=jc-formula data-tex=AB src=https://huaweicloudobs.ahjxjy.cn/6057A50A3760047224EFE95A9FC4F34E.png style=vertical-align: middle;/>都是对称矩阵，那么<img class=jc-formula data-tex=AB=BA src=https://huaweicloudobs.ahjxjy.cn/1A64F48C2D1428E68BA3ECF27171E777.png style=vertical-align: middle;/>.

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