设[img=49x25]1803644d353761a.png[/img]连续,则
A: [img=168x51]1803644d412a444.png[/img]
B: [img=168x51]1803644d4bbf6ac.png[/img]
C: [img=167x51]1803644d581b9c3.png[/img]
D: [img=151x53]1803644d63ba657.png[/img]
A: [img=168x51]1803644d412a444.png[/img]
B: [img=168x51]1803644d4bbf6ac.png[/img]
C: [img=167x51]1803644d581b9c3.png[/img]
D: [img=151x53]1803644d63ba657.png[/img]
举一反三
- 设F(x)是f(x)的一个原函数,C为常数,则( )也是f(x)的一个原函数 A: [img=63x25]1803db37c42f01b.png[/img] B: [img=49x25]1803db37cd03f1f.png[/img] C: [img=49x25]1803db37d5fbb42.png[/img] D: [img=63x25]1803db37dec46a6.png[/img]
- 设积分区域D是由直线y = x,y = 0,x =1围成,则[img=173x60]1803d360a797630.png[/img] A: [img=151x51]1803d360b1cdf24.png[/img] B: [img=151x51]1803d360bbfae34.png[/img] C: [img=151x51]1803d360c6457e5.png[/img] D: [img=151x53]1803d360d1e65df.png[/img]
- 设D是由[img=100x22]18039571413c177.png[/img] 及x轴围成的区域,[img=49x25]180395714939b75.png[/img] 在D上连续,则 [img=153x48]18039571538d5a1.png[/img] ( ) A: [img=152x51]180395715e253f8.png[/img] B: [img=151x51]1803957167b21de.png[/img] C: [img=151x51]180395717270193.png[/img] D: [img=151x53]180395717cc1b75.png[/img]
- 设二维随机变量(X,Y)的协方差[img=106x43]1803b690addcf73.png[/img],且D(X)=4,D(Y)=9,则X与Y的相关系数[img=28x18]1803b690b60844b.png[/img]为 A: [img=27x43]1803b690be8e24f.png[/img] B: [img=18x43]1803b690c71b6d7.png[/img] C: [img=9x43]1803b690cf6fffc.png[/img] D: 1
- 设随机变量X~N(-3,[img=16x22]1803bbe3375949b.png[/img]),则D(X)=4 .