4
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1/2
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52、设三阶方阵A的特征值分别为2,-3,-1,下列各式中不成立的是
(1.0)
A. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/527a848681db7a61e567cbd9069df5df.png" \* MERGEFORMATINET
B. Ax=-3x
C. Ax=-x
D. Ax=x
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5
第9空:
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15、设有一个连通网络如图所示。试采用prim算法从顶点0开始构造最小生成树。( )( )
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22、向量 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/73357b760f571c259794ef21e9f7b9ef.png" \* MERGEFORMATINET
先逆时针旋转 INCLUDEPICTURE \d "http://mooc1-api.chaoxing.com/ananas/latex/p/29250" \* MERGEFORMATINET
,再顺时针旋转 INCLUDEPICTURE \d "http://mooc1-api.chaoxing.com/ananas/latex/p/463231" \* MERGEFORMATINET
得到的向量为( )
(1.0)
A. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/73357b760f571c259794ef21e9f7b9ef.png" \* MERGEFORMATINET
B. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/6d0b6e9f4255e23716df5adbbacccc7b.png" \* MERGEFORMATINET
C. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/62e4261dfaa7c90b847194de5d1bc7eb.png" \* MERGEFORMATINET
D. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/e749a2c6979ee62ee10ddca7dfe12ba9.png" \* MERGEFORMATINET
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56、如图所示,以下说法正确的是 ( ) .
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
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6点,7边
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17、无向图G有12条边,已知有6个3度顶点,其余顶点度数小于3,则G中至少有_____个顶点。
( )
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0.05
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