解不等式：x/(x^2)-8x+15>2
问题描述：
解不等式：x/(x^2)-8x+15>2
答
x/(x^2-8x+15)-2>0
(x-2x^2+16x-30)/(x^2-8x+15)>0
所以(-2x^2+17x-30)(x^2-8x+15)>0
(2x^2-17x+30)(x^2-8x+15)(x-6)(2x-5)(x-3)(x-5)4个零点是5/2,3,5,6
此处是小于
所以5