lim(x→1)(X^2-2X+1)/(X^2-1)的极限

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lim(x→1)(X^2-2X+1)/(X^2-1)的极限
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lim(x→1)(X^2-2X+1)/(X^2-1)的极限
lim(x→1)(X^2-2X+1)/(X^2-1)的极限

lim(x→1)(X^2-2X+1)/(X^2-1)的极限
(x²-2x+1)/(x²-1)
=(x-1)²/(x+1)(x-1)
=(x-1)/(x+1)
所以极限=(1-1)/(1+1)=0