求极限lim(x→-1) (x的立方+1)/[tan(x+1)]

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求极限lim(x→-1) (x的立方+1)/[tan(x+1)]
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求极限lim(x→-1) (x的立方+1)/[tan(x+1)]
求极限lim(x→-1) (x的立方+1)/[tan(x+1)]

求极限lim(x→-1) (x的立方+1)/[tan(x+1)]

lim(x→-1) (x的立方+1)/[tan(x+1)]
=lim(x→-1) (x+1)(x^2-x+1)/(x+1)
=lim(x→-1) (x^2-x+1)
=3