请教一道高数极限题 计算lim(x趋向于2) x2-x-2/x2-4 (注:x2-x-2除x2-4)计算lim(x趋向于
1个回答
lim(x2-x-2)/(x2-4)
=lim(x-2)(x+1)/(x-2)(x+2)
=lim(x+1)/(x+2)
=3/4(x趋向于2)
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