问题标题:
【计算limx→1sin(x-1)/x²-1=?】
问题描述:
计算limx→1sin(x-1)/x²-1=?
吕遐东回答:
当x→1时,
limsin(x-1)/(x²-1)
=limsin(x-1)/(x-1)*1/(x+1)
=limsin(x-1)/(x-1)*lim1/(x+1)
=1*1/(1+1)
=1/2.
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