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单选题 设2阶矩阵A= 
,则A*=( )
A. 
B. 
C. 
D. 
学科：大学数学实验
时间：2023-05-08 21:29:21
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题目1单选题
<img src="https://tihai-oss-cloud.itihey.com/img/b49db47cdb8168be6ef431f648e70f8d.webp">=( )A. 0B. 1C. -1D. INF
题目2单选题
设 <img src="https://tihai-oss-cloud.itihey.com/img/73e2936664f1b13f7ba6fbd53bbe52a2.webp">,则<img src="https://tihai-oss-cloud.itihey.com/img/64e39e9be1ee56eeac84ce83344fbe70.webp"> = ( )A. <img src="https://tihai-oss-cloud.itihey.com/img/e0d60194a2e0e183fee018366d3f546a.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/3ece09d54fa799718f3ffddc88736a51.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/5296b73d89ad0549d020dc4ab1bdc306.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/840c3b9068d8b6b0af2a50c99a3aefe7.webp">
题目3单选题
设2阶矩阵A= <img src="https://tihai-oss-cloud.itihey.com/img/60f3c9690005cd025e900dde0162f212.webp">,则A*=( )A. <img src="https://tihai-oss-cloud.itihey.com/img/cf0d17cc0eecb4723a6bb4566518c106.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/bd743a5420f1fdd631ce685a7d9024ec.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/2a0f553c557c8b7b0c0d6832ace6f860.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/bad17459a324e561146db2cbf75f46f8.webp">
题目4单选题
设<img src="https://tihai-oss-cloud.itihey.com/img/9f694537436a0cad7959519d9c615a22.webp">,则<img src="https://tihai-oss-cloud.itihey.com/img/6b920c938d38000277cb1fd16187cd0b.webp"> ( )A. 12B. 24C. 15D. 22
题目5单选题
设A= <img src="https://tihai-oss-cloud.itihey.com/img/8dbcda44cdf3af475789cb5e532b01ea.webp">,则代数余子式<img src="https://tihai-oss-cloud.itihey.com/img/72d0d36ee4cc5b58a3dcccfda13fe7e8.webp"> = ( )A. 10B. 20C. 30D. 40
题目6单选题
求函数<img src="https://tihai-oss-cloud.itihey.com/img/ad1ef2caea5bc23685eec5accd688266.webp">的导数 ,y′ =( )A. (tan(x/2 + pi/4)^2/2)/tan(x/2 + pi/4)B. (tan(x/2 + pi/4)^2/2 + 1/2)/tan(x/2 + pi/4)C. (tan(x/2 + pi/4)^2 + 1/2)/tan(x/2 + pi/4)D. (tan(x/2 + pi/4)^2/2 + 1/2)/sec(x/2 + pi/4)
题目7单选题
<img src="https://tihai-oss-cloud.itihey.com/img/2fa2c9bde2b21c9ef698fd84269b1b2c.webp">( )A. -3B. -2C. -1D. 1
题目8单选题
求函数<img src="https://tihai-oss-cloud.itihey.com/img/3e4b66bb9680c03fef82055d9a74f08c.webp">的导数,y′ =( )A. x/(a^2 - x^2)^(3/2)B. x/(a^2+x^2)^(3/2)C. x/(a^2 - x^2)^(2/3)D. x/(x^2 - a^2)^(3/2)
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