A: [img=181x45]1802e4addaec7eb.png[/img]
B: [img=164x43]1802e4ade415db3.png[/img]
C: [img=164x38]1802e4adec3b1d4.png[/img]
D: [img=162x39]1802e4adf4124e4.png[/img]
举一反三
- 下列关于不定积分的分部积分公式,错误的是( ) A: [img=181x45]18030dd3ba18815.png[/img] B: [img=164x43]18030dd3c2209aa.png[/img] C: [img=164x38]18030dd3ca2c6b3.png[/img] D: [img=162x39]18030dd3d25fac8.png[/img]
- 下列关于不定积分的分部积分公式,错误的是( ) A: [img=181x45]1802f7c2a1c7882.png[/img] B: [img=164x43]1802f7c2aa5cd44.png[/img] C: [img=164x38]1802f7c2b2bcae1.png[/img] D: [img=162x39]1802f7c2bb70021.png[/img]
- 下列关于不定积分的分部积分公式,错误的是( ) A: [img=181x45]180343b7406a207.png[/img] B: [img=164x43]180343b749cdec8.png[/img] C: [img=164x38]180343b752fab51.png[/img] D: [img=162x39]180343b75bd4369.png[/img]
- 求不定积分[img=115x46]17da65382f8e1b9.png[/img]; ( ) A: x - (5*log(x + 1))/4 - (3*log(x - 3)) B: (5*log(x + 1))/4 - (3*log(x - 3)) C: x - (5*log(x + 1))/4 - (3*log(x - 3))/4 D: (5*log(x + 1))/4 - (3*log(x - 3))/4
- 设[img=77x19]1802e2aa5a4095f.jpg[/img],则E(X)=4,D(X)=4/3.
内容
- 0
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
已知随机变量X的分布函数为[img=136x49]1803b69024c8270.png[/img] ,则X的均值和方差分别为 A: E(X)=2, D(X)=4 B: E(X)=4, D(x)=2 C: [img=162x43]1803b6902cd8bfb.png[/img] D: [img=162x43]1803b69034d9ffd.png[/img]
- 2
已知X的分布律为P(X=-1)=1/4,P(X=0)=1/4,P(X=1)=3/8,P(X=3)=1/8,则E(2X+1)=( ),E([img=42x20]17e0c5d65688ad3.jpg[/img])=( )。
- 3
设随机变量(X, Y )的分布律为[img=278x153]1802e8d5158f2ae.png[/img]则E(X – Y )=( ). A: 1/2 B: 3/4 C: - 1/4 D: 1
- 4
求不定积分[img=112x35]17da6538063a9e4.png[/img]; ( ) A: (x^4*log(x)^2)/4 + (x^4*(log(x) - 1/4))/ B: (x^4*log(x)^2)/4 - (x^4*(log(x) - 1/4))/8 C: (x^4*log(x)^2)/4 - (x^4*(log(x) - 1/4)) D: (x^4*log(x)^2)/4 + (x^4*(log(x) - 1/4))/8