- 首页
- 行政执法资格
-
1.x[-n] 表示除了第n个元素的x
-
2.【答案】年 includefloat f (float x,int n)if(n==0)return 1;return (x*f (x, n-1));void main(float×;
-
3.已知ZT[x(n)]=X(z),则ZT[x(-n)]=
-
4.lín xún
-
5.设集合M={x|x(x-1)<0},N={x|x 2 <4},则 A.M∩N=φ B.M∩N=M C.M∪N=M D.M∪N=R
-
6.-x n -3x 2n 分解因式正确的是[ ]A、3(-2x n -x 2n )B、-3x n (2-x n )C、-3(2x n x 2n )D、-3x n (x n 2)
-
7.以下是一个快速幂算法:def pow(x, n): if n==0: return 1 elif n==1: return x elif n%2==0:
-
8.63.已知x(n)={3,4,5,6},h(n)=x(0.5n-1)=
-
9.If the lengths of signal x[n] and y[n] are N and M respectively, and if z[n] stands for the convolution
-
10.设集合M={x|1≤x≤3},N={x|2≤x≤4},则M∩N=