已知[img=155x25]18030bf20acb734.png[/img]，则[img=33x26]18030bf21342a95.png[/img]
A: [img=97x44]18030bf21f7bd07.png[/img]
B: [img=97x44]18030bf22773457.png[/img]
C: [img=87x44]18030bf22fd0077.png[/img]
D: [img=97x44]18030bf2392a45c.png[/img]
E: [img=97x44]18030bf241c3c0e.png[/img]
A: [img=97x44]18030bf21f7bd07.png[/img]
B: [img=97x44]18030bf22773457.png[/img]
C: [img=87x44]18030bf22fd0077.png[/img]
D: [img=97x44]18030bf2392a45c.png[/img]
E: [img=97x44]18030bf241c3c0e.png[/img]
举一反三
- 若函数[img=27x44]180342e86f2d809.png[/img]为f(x)的一个原函数，则不定积分[img=84x47]180342e877ee13d.png[/img]= A: [img=88x44]180342e880ed5fc.png[/img] B: [img=88x44]180342e8897fe3d.png[/img] C: [img=97x44]180342e89295c67.png[/img] D: [img=97x44]180342e89af84b7.png[/img]
- ${\rm var}(X)=\,$ ${\bf E}[X]=\,$ ${\bf P}(X=3)=\,$ ${\bf P}(X=-2)=\,$ ${\bf P}(X=1)=\,$ ${\bf P}(X=0)=\,$______
- ${\bf P}(X=4)=\,$ ${\bf P}(X=3)=\,$ ${\bf P}(X=2)=\,$ ${\bf P}(X=1)=\,$______
- ${\bf P}(X=-2)=\,$ ${\bf P}(X=1)=\,$ ${\bf P}(X=0)=\,$______
- 设随机变量X,Y相互独立,且[img=167x27]17da6334a00d255.png[/img],[img=85x19]17da6334b1f3f8e.png[/img],则[img=55x27]17da6334bb9ebfa.png[/img]( ). A: 8 B: 16 C: 28 D: 44