区域D由直线y=x、x=0及y=1围成, 下列表示正确的是
A: [img=272x25]18030c4c60fe7d8.png[/img]
B: [img=272x25]18030c4c6bac4a8.png[/img]
C: [img=296x43]18030c4c763f6fe.png[/img]
D: [img=272x25]18030c4c7f93767.png[/img]
E: [img=274x25]18030c4c89e9885.png[/img]
F: [img=273x25]18030c4c9539eed.png[/img]
G: [img=294x43]18030c4ca0b0bc2.png[/img]
H: [img=272x39]18030c4cacd13b5.png[/img]
I: [img=298x43]18030c4cb7651d1.png[/img]
J: [img=294x43]18030c4cc272664.png[/img]
K: [img=296x43]18030c4ccd34c95.png[/img]
A: [img=272x25]18030c4c60fe7d8.png[/img]
B: [img=272x25]18030c4c6bac4a8.png[/img]
C: [img=296x43]18030c4c763f6fe.png[/img]
D: [img=272x25]18030c4c7f93767.png[/img]
E: [img=274x25]18030c4c89e9885.png[/img]
F: [img=273x25]18030c4c9539eed.png[/img]
G: [img=294x43]18030c4ca0b0bc2.png[/img]
H: [img=272x39]18030c4cacd13b5.png[/img]
I: [img=298x43]18030c4cb7651d1.png[/img]
J: [img=294x43]18030c4cc272664.png[/img]
K: [img=296x43]18030c4ccd34c95.png[/img]
举一反三
- 区域D由直线y=x、x=0及y=1围成, 下列表示正确的是 A: [img=272x25]180322e263a6685.png[/img] B: [img=272x25]180322e26e4be50.png[/img] C: [img=296x43]180322e27956b29.png[/img] D: [img=272x25]180322e285052c4.png[/img] E: [img=274x25]180322e290719e0.png[/img] F: [img=273x25]180322e29b0fcda.png[/img] G: [img=294x43]180322e2a5911c5.png[/img] H: [img=272x39]180322e2b0d9dd5.png[/img] I: [img=298x43]180322e2bcfe4f6.png[/img] J: [img=294x43]180322e2c79cf92.png[/img] K: [img=296x43]180322e2d24510e.png[/img]
- 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
- 设随机变量(X,Y)在区域{(x,y): 0<|y|< x <2}内均匀分布,则以下结果正确的是 A: 当0<x<2时,[img=96x25]1802dded7db6eef.png[/img]. B: E(X)=4/3 C: 当0<|y|<2时,[img=105x45]1802dded872b92f.png[/img]. D: P(X<1)=0.5 E: 当0<x<2时,[img=110x45]1802dded915de6e.png[/img]. F: E(X)=2/3 G: 当0<y<2时,[img=95x43]1802dded9a54300.png[/img].
- 设二维随机变量(X,Y)的概率密度为[img=356x71]1803395b6527b0d.png[/img]设Z = X + Y的概率密度[img=40x25]1803395b6dc36d8.png[/img],则[img=41x25]1803395b7554ba4.png[/img]=( ). A: 0 B: 1/8 C: 1/4 D: 3/4
- 设二维随机变量(X,Y)的概率密度为[img=356x71]1802f2b509f652e.png[/img]设Z = X + Y的概率密度[img=40x25]1802f2b5127d386.png[/img],则[img=41x25]1802f2b51a7de69.png[/img]=( ). A: 0 B: 1/8 C: 1/4 D: 3/4