Question

设集合A={y｜y=x2},},B={y｜y=1-x2},求A∩B(急啊~)

Answer 1

由题意可知

y=x2

y=1-x2,即

x^2=1-x^2,x^2=1/2

y=1/2

所以A∩B={1/2}