A={X|logx (5x^2-8x+3)>2} B={x|x^2-2x-a^4+1>=

问题描述:

A={X|logx (5x^2-8x+3)>2} B={x|x^2-2x-a^4+1>=

logx (5x2;-8x+3)>2 logx (5x2;-8x+3)>logx x2; 1、若0