计算2x／（x³-1）÷1／（x²+x+1）= - 知识问答

计算2x／（x³-1）÷1／（x²+x+1）=

1个回答

[2x／（x³-1）]÷[1／（x²+x+1）]
=(2x)(x²+x+1)/(x³-1)
=(2x)(x²+x+1)/[(x-1)(x²+x+1)]
=2x/(x-1)
=(2x-2+2)/(x-1)
=2+ 2/(x-1)

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