若向量[img=27x29]1803bbf0a3a1732.png[/img],且向量[img=115x29]1803bbf0ab97983.png[/img],[img=35x24]1803bbf0b543bb7.png[/img]= - 18,则[img=29x19]1803bbf0bd455ca.png[/img]( )
A: (4,-2,-4)
B: (-4,-2,-4)
C: (-4,2,4)
D: (4,-2,4)
A: (4,-2,-4)
B: (-4,-2,-4)
C: (-4,2,4)
D: (4,-2,4)
举一反三
- 若向量[img=27x29]1803bbf1e1cd681.png[/img],且向量[img=115x29]1803bbf1e945ae2.png[/img],[img=35x24]1803bbf1f13de8a.png[/img]= - 18,则[img=29x19]1803bbf1fc71fcd.png[/img]( ) A: (4,-2,-4) B: (-4,-2,-4) C: (-4,2,4) D: (4,-2,4)
- 求不定积分[img=121x54]17da653839aa6ae.png[/img]; ( ) A: log(x^2 + 3*x + 25/4)/4 + (5*atan(x/2 + 3/4))/4 B: log(x^2 + 3*x + 25/4)/4 C: (5*atan(x/2 + 3/4))/4 D: log(x^2 + 3*x + 25/4)/4 - (5*atan(x/2 + 3/4))/4
- 设[img=84x22]17e0ab7201ab5da.jpg[/img],且P{2<;X<;4}=0.1,不查表计算P{X<;0}=( ) A: 1/5 B: 2/5 C: 3/5 D: 4/5
- 设[img=84x22]17e43a3ff587368.jpg[/img],且P{2<;X<;4}=0.1,不查表计算P{X<;0}=( ) A: 1/5 B: 2/5 C: 3/5 D: 4/5
- 矩阵[img=117x63]18034e621c98abd.png[/img]的三个特征值是( ). A: 1, 4, 0 B: 2, 3 , 0 C: 2, 4, 0 D: 2, 4, -1