正整数n小于100,并且满足等式[n2]+[n3]+[n6]=n,其中[x]表示不超过x的最大整数,这样的正整数n有( )个
A: 2
B: 3
C: 12
D: 16
A: 2
B: 3
C: 12
D: 16
举一反三
- 序列x(n)=cos[(πn/4)]+sin[(πn/6)]的周期为 A: 24 B: 2π C: 8 D: 非周期
- 已知序列h(n)=[1,2,0,1],x(n)=[2,2,1,1],则h(n)⑧x(n)= A: [2,6,5,5,4,1,1,0] B: [2,6,5,5,4,1,2,0] C: [2,6,5,5,4,2,1,0] D: [2,6,5,5,4,0,1,0]
- 判断一个整数n是偶数的表达式是[填空(1)]A.n%2==0或者n%2!=1
- 已知集合M={x|},N={},则M∩N=[ ]
- The result of the following program is ( ).x=[0,1,1,0,0]; y=[0,0,1,1,0]; for n=1:3 plot(n*x,n*y) hold on end axis equal A: 3 rectangles with lower-left corner at the origin B: 3 rectangles with center at origin C: 3 straight lines D: 15 points