lim x-2 (x3-8)/(x2-4) 求极限
问题描述:
lim x-2 (x3-8)/(x2-4) 求极限
答
(x³-8)/(x²-4)
=[(x-2)(x²+2x+4)]/[(x-2)(x+2)]
=(x²+2x+4)/(x+2)
再代入,得极限是:3