xチ0ナ5-1/xチ0ナ5-4x 3的函数值趋于1时的极限
1个回答
2016-11-05
展开全部
x趋于1
lim(x^2-1)/(x^2-4x +3)
=lim(x-1)(x+1)/[(x-1)(x -3)]
=lim(x+1)/(x-3)
=-1
lim(x^2-1)/(x^2-4x +3)
=lim(x-1)(x+1)/[(x-1)(x -3)]
=lim(x+1)/(x-3)
=-1
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