设集合m={(x|y=根号(1-x^2)},n={y|y=(1/2)^x},则m交nA[-1,1] B(0,1) C(0,1] D[0,1]
问题描述:
设集合m={(x|y=根号(1-x^2)},n={y|y=(1/2)^x},则m交n
A[-1,1] B(0,1) C(0,1] D[0,1]
答
m:-1≤x≤1
n:0≤y≤+∞
所以选B