1+x+x²+x³=0,求x+x²+x³+…+x^2000
1+x+x²+x³=0,求x+x²+x³+…+x^2000
數(shù)學人氣:454 ℃時間:2020-01-19 22:47:29
優(yōu)質(zhì)解答
x+x²+x³+…+x^2000中每相鄰四個分為一組即x+x²+x³+x^4=x(1+x+x²+x³)=x*0=0x^5+x^6+x^7+x^8=x^5(1+x+x²+x³)=0x^9+x^10+x^11+x^12=x^9(1+x+x²+x³)=0……x^1997+x^1...
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