计算下列极限[tex=7.857x1.929]MqOfsQLAB/zeVSdv1WggGJzD8FlSPdx/+VJ1FKsc1mQ9y+QNcHEQcjKYu8p14q4jCE0ApvVAwZVf/qPw19nzWg==[/tex]
举一反三
- 计算极限:[tex=8.357x1.571]MqOfsQLAB/zeVSdv1WggGJzD8FlSPdx/+VJ1FKsc1mTU55v7ZtxcHfypzOom4DgiNcoJUo3FWCeaGAKE9I9H3A==[/tex] .
- 已知x(n)={1, 2, 3},y(n)={1, 2, 1},则x(n)*y(n)=________。(下划线表示n=0) A: {1, 4, 8, 8, 3} B: {1, 4, 8, 8, 3} C: {1, 4, 8, 8, 3} D: {1, 4, 8, 8, 3}
- intx=5,y=8,z=7;表达式z=!(x>y)||(x=1,y=3)计算后的结果 A: x=1,y=3,z=1 B: x=1,y=3,z=0 C: x=5,y=8,z=0 D: x=5,y=8,z=1
- 已知X的分布律为P(X=-1)=1/4,P(X=0)=1/4,P(X=1)=3/8,P(X=3)=1/8,则E(2X+1)=( ),E([img=42x20]17e0c5d65688ad3.jpg[/img])=( )。
- 设随机变量(X,Y)的联合密度函数为p(x,y)=k(6-x-y),0 (1) 1/8 (2) 3/8