求极限lim(x-3)/(x^-9)(x→3)

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求极限lim(x-3)/(x^-9)(x→3)
求极限lim(x-3)/(x^-9)(x→3)

求极限lim(x-3)/(x^-9)(x→3)
lim(x-3)/(x^-9)(x→3)
=lim(x-3)/[(x+3)(x-3)]
=lim1/(x+3)
=1/(3+3)
=1/6

(x-3)/(x²-9)
=(x-3)/[(x-3)(x+3)]
=1/(x+3)
=1/6
省略求极限符号lim~~

x的几次方呀？

lim(x-3)/(x^-9)(x→3)
=lim(x-3)/[(x+3)(x-3)]
=lim1/(x+3)
=1/(3+3)
=1/6

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