解不等式x/x2-7x+12≤1 急!
问题描述:
解不等式x/x2-7x+12≤1 急!
答
x/x^2-7x+12≤1
x/x^2-7x+12-1≤0
(x^2-8x+12)/(x^2-7x+12)≥0
[(x-2)(x-6)]/[(x-3)(x-4)]≥0
=>x≤2或3≤x≤4或x≥6