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计算:x²+x+1-(x³)/(x-1)
人气:212 ℃ 时间:2020-01-22 22:26:57
解答
x²+x+1-(x³)/(x-1)
=[(x-1)(x²+x+1)-x³]/(x-1)
=(x³-1-x³)/(x-1)
=-1/(x-1)
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