f(x)+2f(1/x)=3x+1如何转化为f(1/x)+2f(x)=3/x+1的?老师给了个提示用到倒数讲了N遍我都不懂 还是这一部分的换元法我不太清楚 用换元法解 f(x+1)=x²-x 求f(x)=?
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![f(x)+2f(1/x)=3x+1如何转化为f(1/x)+2f(x)=3/x+1的?老师给了个提示用到倒数讲了N遍我都不懂 还是这一部分的换元法我不太清楚 用换元法解 f(x+1)=x²-x 求f(x)=?](/uploads/image/z/8962492-4-2.jpg?t=f%EF%BC%88x%EF%BC%89%2B2f%EF%BC%881%2Fx%EF%BC%89%3D3x%2B1%E5%A6%82%E4%BD%95%E8%BD%AC%E5%8C%96%E4%B8%BAf%EF%BC%881%2Fx%EF%BC%89%2B2f%EF%BC%88x%EF%BC%89%3D3%2Fx%2B1%E7%9A%84%3F%E8%80%81%E5%B8%88%E7%BB%99%E4%BA%86%E4%B8%AA%E6%8F%90%E7%A4%BA%E7%94%A8%E5%88%B0%E5%80%92%E6%95%B0%E8%AE%B2%E4%BA%86N%E9%81%8D%E6%88%91%E9%83%BD%E4%B8%8D%E6%87%82+%E8%BF%98%E6%98%AF%E8%BF%99%E4%B8%80%E9%83%A8%E5%88%86%E7%9A%84%E6%8D%A2%E5%85%83%E6%B3%95%E6%88%91%E4%B8%8D%E5%A4%AA%E6%B8%85%E6%A5%9A+%E7%94%A8%E6%8D%A2%E5%85%83%E6%B3%95%E8%A7%A3+f%EF%BC%88x%2B1%EF%BC%89%3Dx%26%23178%3B-x+%E6%B1%82f%EF%BC%88x%EF%BC%89%3D%3F)
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