lim下面x→3,(x눀-7x+12)⼀x눀-x-6?

洛必达求极限
2025-01-19 03:16:16
推荐回答(2个)
回答1:

解,limx→3,
(x^2-7x+12)/(x^2-x-6)
=(x-3)(x-4)/[(ⅹ-3)(x+2)]
=(x-3)/(x-3)(x-4)/(x+2)
=1*(3-4)/(4+2)
=-1/6

回答2: