(x²+2x-3)/sin(x+3）（x＜-3)的极限

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(x²+2x-3)/sin(x+3）（x＜-3)的极限
(x²+2x-3)/sin(x+3）（x＜-3)的极限

(x²+2x-3)/sin(x+3）（x＜-3)的极限
lim(x--- -3) (x-1)*(x+3)/sin(x+3)
=lim(x--- -3) (x-1)*1/[sin(x+3)/(x+3)]
=(-3-1)*1
=-4