2f(x)+x^2f(1/x)=(3x³-x²+4x+3)/(x+1) 2x²f(1/x)+f(x)=(3-x+4x²+3x³)/(x+1)这两步是怎么简化来的,
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2f(x)+x^2f(1/x)=(3x³-x²+4x+3)/(x+1)2x²f(1/x)+f(x)=(3-x+4x²+3x³)/(x+1)这两步是怎么
2f(x)+x^2f(1/x)=(3x³-x²+4x+3)/(x+1) 2x²f(1/x)+f(x)=(3-x+4x²+3x³)/(x+1)这两步是怎么简化来的,
2f(x)+x^2f(1/x)=(3x³-x²+4x+3)/(x+1) 2x²f(1/x)+f(x)=(3-x+4x²+3x³)/(x+1)
这两步是怎么简化来的,
2f(x)+x^2f(1/x)=(3x³-x²+4x+3)/(x+1) 2x²f(1/x)+f(x)=(3-x+4x²+3x³)/(x+1)这两步是怎么简化来的,
令x=1/t,有
2f(1/t)+(1/t)^2f(t)=...
化简去分母后
2t²f(1/t)+f(t)=(3-t+4t²+3t³)/(t+1)
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