(x^2-9x+11)/(x^2-2x+1)〉7则么解?
问题描述:
(x^2-9x+11)/(x^2-2x+1)〉7则么解?
答
(x²-9x+11)/(x²-2x+1)>7则么解?
由于分母x²-2x+1=(x-1)²>0,所以原不等式两边同时乘以(x²-2x+1),得:
x²-9x+11>7(x²-2x+1)
整理为:
6x²-5x-4