已知f[(1-x)/(1+x)]=x,求f(x)的表达式?令(1-x)/(1+x)等于t,即t=(1-x)/(1+x),得:x=(1-t)/(1+t)则:f(t)=(1-t)/(1+t)然后再令t=x.得到:f(x)=(1-x)/(1+x)可是我们知道 t=(1-x)/(1+x),为什么能把t=x,这里求出的表达式不是不
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/27 00:43:08
![已知f[(1-x)/(1+x)]=x,求f(x)的表达式?令(1-x)/(1+x)等于t,即t=(1-x)/(1+x),得:x=(1-t)/(1+t)则:f(t)=(1-t)/(1+t)然后再令t=x.得到:f(x)=(1-x)/(1+x)可是我们知道 t=(1-x)/(1+x),为什么能把t=x,这里求出的表达式不是不](/uploads/image/z/331762-58-2.jpg?t=%E5%B7%B2%E7%9F%A5f%5B%281-x%29%2F%281%2Bx%29%5D%3Dx%2C%E6%B1%82f%28x%29%E7%9A%84%E8%A1%A8%E8%BE%BE%E5%BC%8F%3F%E4%BB%A4%281-x%29%2F%281%2Bx%29%E7%AD%89%E4%BA%8Et%2C%E5%8D%B3t%3D%281-x%29%2F%281%2Bx%29%2C%E5%BE%97%EF%BC%9Ax%3D%281-t%29%2F%281%2Bt%29%E5%88%99%EF%BC%9Af%28t%29%3D%281-t%29%2F%281%2Bt%29%E7%84%B6%E5%90%8E%E5%86%8D%E4%BB%A4t%3Dx.%E5%BE%97%E5%88%B0%EF%BC%9Af%28x%29%3D%281-x%29%2F%281%2Bx%29%E5%8F%AF%E6%98%AF%E6%88%91%E4%BB%AC%E7%9F%A5%E9%81%93+t%3D%281-x%29%2F%281%2Bx%29%2C%E4%B8%BA%E4%BB%80%E4%B9%88%E8%83%BD%E6%8A%8At%3Dx%2C%E8%BF%99%E9%87%8C%E6%B1%82%E5%87%BA%E7%9A%84%E8%A1%A8%E8%BE%BE%E5%BC%8F%E4%B8%8D%E6%98%AF%E4%B8%8D)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/27 00:43:08