设 [img=78x41]180303721b01b7f.png[/img] [img=105x51]18030372235701e.png[/img] 则 [img=204x28]1803037230e3188.png[/img]
举一反三
- 设f(x)=[img=15x18]17da42685cb8d76.jpg[/img],则f【f'(x)】=
- 设随机变量 X ~ e([img=11x19]1803bbe33f2dc36.png[/img])，则 D(X )= [img=18x43]1803bbe34777894.png[/img].
- 设f(x)为连续型随机变量X的密度函数，则对任意的a<b，E(X)=（ ）. A: [img=92x39]1802e2aa01c2150.jpg[/img] B: [img=81x40]1802e2aa0b123c6.jpg[/img] C: [img=70x40]1802e2aa139d6a9.jpg[/img] D: [img=99x48]1802e2aa1bc0ab9.png[/img]
- 若f(x)+f(-x)=0, 则[img=95x39]17da608af452d96.jpg[/img]. 若f(x)=f(-x), 则 [img=170x38]17da60541207426.jpg[/img]
- 设可导函数f(x)满足[img=176x51]1803961986a314e.png[/img]，则f(x)是（） A: [img=95x27]180396198f4c417.png[/img] B: [img=70x27]18039619987c3eb.png[/img] C: [img=64x25]18039619a13ae36.png[/img] D: [img=70x27]18039619aab001f.png[/img] E: [img=77x25]18039619b2b3f0a.png[/img] F: [img=65x23]18039619bb55680.png[/img]