计算级数[img=89x60]1802ed4ad849fc9.png[/img]的收敛区间为( )
A: [img=52x25]1802ed4ae02e4ed.png[/img]
B: [img=49x25]1802ed4ae916bc5.png[/img]
C: [img=59x43]1802ed4af0cd77f.png[/img]
D: [img=58x43]1802ed4af8c5dee.png[/img]
A: [img=52x25]1802ed4ae02e4ed.png[/img]
B: [img=49x25]1802ed4ae916bc5.png[/img]
C: [img=59x43]1802ed4af0cd77f.png[/img]
D: [img=58x43]1802ed4af8c5dee.png[/img]
举一反三
- 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
- 设[img=77x19]1802e2aa5a4095f.jpg[/img]，则E(X)=4，D(X)=4/3.
- 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]
- 计算级数[img=89x60]1802ed4d8ca5045.png[/img]的收敛区间为( ) A: [img=52x25]1802ed4d94fcad4.png[/img] B: [img=49x25]1802ed4d9caa848.png[/img] C: [img=59x43]1802ed4da55c23a.png[/img] D: [img=64x43]1802ed4dad5d900.png[/img]