已知x^3+x-1=0,求X^3+2X^2+2008的值
已知x^3+x-1=0,求X^3+2X^2+2008的值
數(shù)學(xué)人氣：275 ℃時(shí)間：2020-02-04 23:52:04
優(yōu)質(zhì)解答
x^3+x-1=0.因?yàn)閤-1=1.所以x^3=-1.所以x=1.所以X^3+2X^2+2008=2009
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