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Let f(x^m y^n)=mf(x)+nf(y) for all x , y...

Let `f(x^m y^n)=mf(x)+nf(y)` for all `x , y in R^+` and for all `m ,n in Rdot` If `f^(prime)(x)` exists and has the value `e/x ,` then find `(lim)_(xvec0)(f(1+x))/x`

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