下列定积分计算正确的是（ ）.
A: [img=298x51]1802dc1d3b2b859.png[/img][img=420x51]1802dc1d45a76a5.png[/img]
B: [img=298x51]1802dc1d4fb8db5.png[/img][img=358x51]1802dc1d59d8d36.png[/img]
C: [img=298x51]1802dc1d640833a.png[/img][img=514x51]1802dc1d6e4f80a.png[/img]
D: [img=298x51]1802dc1d79280c0.png[/img][img=358x51]1802dc1d848ea4f.png[/img]
A: [img=298x51]1802dc1d3b2b859.png[/img][img=420x51]1802dc1d45a76a5.png[/img]
B: [img=298x51]1802dc1d4fb8db5.png[/img][img=358x51]1802dc1d59d8d36.png[/img]
C: [img=298x51]1802dc1d640833a.png[/img][img=514x51]1802dc1d6e4f80a.png[/img]
D: [img=298x51]1802dc1d79280c0.png[/img][img=358x51]1802dc1d848ea4f.png[/img]
举一反三
- 下列定积分计算正确的是（ ）. A: [img=298x51]18038691195e0a5.png[/img][img=420x51]180386912590449.png[/img] B: [img=298x51]1803869131723d2.png[/img][img=358x51]180386913e08164.png[/img] C: [img=298x51]1803869149a9b69.png[/img][img=514x51]18038691558bba4.png[/img] D: [img=298x51]18038691610961d.png[/img][img=358x51]180386916c7a5bd.png[/img]
- 设随机变量X服从均值为2的指数分布，X的分布函数为F(x)，数学期望为E(X)，方差为D(X)，则以下结果正确的是 A: [img=128x28]1802d3b369ab5fe.png[/img] B: D(X)=4 C: P(X<2︱X>1)=F(1) D: P(X>2︱X>1)= F(1) E: [img=112x27]1802d3b372fb534.png[/img] F: D(X)=E(X) G: P(X≤2︱X>1)= F(2) H: [img=82x27]1802d3b37bbbf05.png[/img]
- 设随机变量X服从均值为2的指数分布，X的分布函数为F(x)，数学期望为E(X)，方差为D(X)，则以下结果正确的是 A: [img=128x28]18034b986fbc78a.png[/img] B: D(X)=4 C: P(X<2︱X>1)=F(1) D: P(X>2︱X>1)= F(1) E: [img=112x27]18034b98781508a.png[/img] F: D(X)=E(X) G: P(X≤2︱X>1)= F(2) H: [img=82x27]18034b9880d080a.png[/img]
- 设随机变量X服从均值为2的指数分布，X的分布函数为F(x)，数学期望为E(X)，方差为D(X)，则以下结果正确的是 A: [img=128x28]18033e117e9725e.png[/img] B: D(X)=4 C: P(X<2︱X>1)=F(1) D: P(X>2︱X>1)= F(1) E: [img=112x27]18033e11879f263.png[/img] F: D(X)=E(X) G: P(X≤2︱X>1)= F(2) H: [img=82x27]18033e1190d2ef2.png[/img]
- 设随机变量X服从均值为2的指数分布，X的分布函数为F(x)，数学期望为E(X)，方差为D(X)，则以下结果正确的是 A: [img=128x28]18036372a260d4c.png[/img] B: D(X)=4 C: P(X<2︱X>1)=F(1) D: P(X>2︱X>1)= F(1) E: [img=112x27]18036372aa45c90.png[/img] F: D(X)=E(X) G: P(X≤2︱X>1)= F(2) H: [img=82x27]18036372b2a31e1.png[/img]