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数学
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已知2xチ0ナ5+4x-8=0,求x的值为多少?
人气:345 ℃ 时间:2020-10-02 07:13:01
解答
X^2+X+1=(x^3-1)/(x-1)=0 x^3=1 X^30+X^40+X^50=(x^9.x)^3+(x^9.x)^4+(x^9.x)^5=0
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