向量[img=89x85]1802fef4a888425.png[/img]的2-范数是?
A: 11
B: 5
C: 3
D: [img=34x26]1802fef4b159f5f.png[/img]
A: 11
B: 5
C: 3
D: [img=34x26]1802fef4b159f5f.png[/img]
举一反三
- 函数[img=196x27]17de92706aff834.png[/img],已知f(x)在x=-3处取得极值,则 a等于( ) A: 2 B: 3 C: 4 D: 5
- 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
- 1.求向量x=(1,2,3)的∞-范数为()。 A: 3 B: 6 C: [img=34x26]1802f32ac3c3688.png[/img] D: 1
- 设[img=127x53]17f1b3d6db98b83.jpg[/img],f(x)=arctanΧ,则[img=56x55]17f1b3d82842941.jpg[/img]=()。 A: π B: 3π/4 C: -3π/4 D: 2π
- 设f(x)为连续函数,且 [img=217x49]18034a50d8b1b92.png[/img] 则[img=70x25]18034a50e196c62.png[/img] A: 5 B: 4 C: 0 D: -5