极限求值谢谢
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极限求值谢谢
极限求值谢谢
极限求值谢谢
原式=limx->-1 (x+1)(x-1)/(x+2)(x+1)
=limx->-1 (x-1)/(x+2)
=-2
lim(x→ -1) (x^2-1)/(x^2+3x+2)
= lim(x→ -1) (x+1)(x-1)/(x+1)(x+2)
= lim(x→ -1) (x-1)/(x+2)
= (-1-1)/(-1+2)
= -2
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