A、 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/8d20d56c6127cc96b7e82bf3b108e066.png" \* MERGEFORMATINET
B、 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/45716c0b86036041d966258ffc59f340.png" \* MERGEFORMATINET
C、 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/d44ccd518c7d8ce91bbdece690509d7a.png" \* MERGEFORMATINET
D、 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/13176250575a997b8b0dfa7183b109eb.png" \* MERGEFORMATINET
答案:D
A、 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/8d20d56c6127cc96b7e82bf3b108e066.png" \* MERGEFORMATINET
B、 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/45716c0b86036041d966258ffc59f340.png" \* MERGEFORMATINET
C、 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/d44ccd518c7d8ce91bbdece690509d7a.png" \* MERGEFORMATINET
D、 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/13176250575a997b8b0dfa7183b109eb.png" \* MERGEFORMATINET
答案:D
A. 若干个可逆的n阶矩阵之积可逆,且其逆为这些矩阵的逆按相同顺序的乘积
B. 若A可逆,则 INCLUDEPICTURE \d "http://mooc1-api.chaoxing.com/ananas/latex/p/34176" \* MERGEFORMATINET 的逆就是A本身。
C. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/59948f7de2981a3968f6f48a17b271e7.png" \* MERGEFORMATINET
D. 若A是3阶矩阵,且方程 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/51b7a79a8c8b2da9d131cce3a4d20f8f.png" \* MERGEFORMATINET 有唯一解,则A可逆
A. {(a, e)}是割边
B. {(a, e)}是边割集
C. {(a, e) ,(b, c)}是边割集
D. {(d, e)}是边割集
A. 72
B. 48
C. 24
D. 12
A. ①
B. ③
C. ①③
D. ①②
A. 前n个奇数之和
B. 前n个偶数之和
C. 前n个正整数之和
D. n的阶乘