lim(x→2)(2x^2-5x+2)/(x^2-x-2)
问题描述:
lim(x→2)(2x^2-5x+2)/(x^2-x-2)
答
lim(x→2)(2x^2-5x+2)/(x^2-x-2)
=lim(x→2)(2x-1)(x-2)/(x-2)(x+1)
=lim(x→2)(2x-1)/(x+1)
=3/2+1
=1