Tuesday, April 5, 2016

calculus - prove f(x)f(y)=f(xy),f(1)=1ifff(x)=xk(kreal)


prove f(x)f(y)=f(xy),f(1)=1f(x)=xk(k real) for f:R+R+




I find f(ar)=f(a)r for rational r, but I cannot move to the next step.

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