1/(1-x)-1/(1+x)-2x/1+x²-4x³/1+x^4-8x^7/(1-x^8) 计算衔接教材的答案是0
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1/(1-x)-1/(1+x)-2x/1+x²-4x³/1+x^4-8x^7/(1-x^8) 计算衔接教材的答案是0
1/(1-x)-1/(1+x)-2x/1+x²-4x³/1+x^4-8x^7/(1-x^8) 计算
衔接教材的答案是0
1/(1-x)-1/(1+x)-2x/1+x²-4x³/1+x^4-8x^7/(1-x^8) 计算衔接教材的答案是0
1/(1-x)-1/(1+x)-2x/1+x²-4x³/1+x^4-8x^7/(1-x^8)
=(1+x-1+x)/(1-x²)-2x/1+x²-4x³/1+x^4-8x^7/(1-x^8)
=2x/(1-x²)-2x/1+x²-4x³/1+x^4-8x^7/(1-x^8)
=2x(1+x²-1+x²)/(1-x^4)-4x³/1+x^4-8x^7/(1-x^8)
=4x³/(1-x^4)-4x³/(1+x^4)-8x^7/(1-x^8)
=4x³(1+x^4-1+x^4)/(1-x^8)-8x^7/(1-x^8)
=8x^7/(1-8x^8)-8x^7/(1-x^8)
=0
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