Question

已知集合A=x|-2≤x≤3 x属于Z B=y|y=x^2-3 X属于A C=A交B 求C的子集 ...

Answer 1

集合A=x|-2≤x≤3 x属于Z ,则A={-2,-1,0,1,2,3}

B=y|y=x^2-3,X属于A,则B={-1,-2,-3,1,4,6} (把A中元素逐个代入)

C=AnB={-2,-1,0,1,2,3)n{-1,-2,-3,1,4,6}

={-2,-1,1}