已知:1+x+xx+xxx==0,求:x+xx+xxx+...+x^2004的
4个回答
比较(1+x),(xx+xxx),相同项为(x+1),则可化简为(x+1)(xx+x+1)=0,所以x=-1
以为x+xx=0,xxx+xxxx=0则每两项循环为0,所以题目答案是0
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