作业帮函数f（x）=cx/2x+3（x≠-2/3）满足 f [f（x）]=x,求常数c.
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![函数f（x）=cx/2x+3（x≠-2/3）满足 f [f（x）]=x,求常数c.](/uploads/image/z/5176840-40-0.jpg?t=%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3Dcx%2F2x%2B3%EF%BC%88x%E2%89%A0-2%2F3%EF%BC%89%E6%BB%A1%E8%B6%B3+f+%5Bf%EF%BC%88x%EF%BC%89%5D%3Dx%2C%E6%B1%82%E5%B8%B8%E6%95%B0c.)
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函数f（x）=cx/2x+3（x≠-2/3）满足 f [f（x）]=x,求常数c.
函数f（x）=cx/2x+3（x≠-2/3）满足 f [f（x）]=x,求常数c.
函数f（x）=cx/2x+3（x≠-2/3）满足 f [f（x）]=x,求常数c.
代值就行了,只是计算感觉有点复杂