已知集合A={x|x^2+4x=0},B={x|0
问题描述:
已知集合A={x|x^2+4x=0},B={x|0
答
A = {-4,0}(1) a = 1:B = {x | -1 0-1 ≤ a 0B = {x | -1/a 00
已知集合A={x|x^2+4x=0},B={x|0
A = {-4,0}(1) a = 1:B = {x | -1 0-1 ≤ a 0B = {x | -1/a 00