Friday, 19 August 2016

calculus - Let f be a function such that f(ab)=f(a)+f(b) with f(1)=0 and derivative of f at 1 is 1.

Let f be a function such that f(ab)=f(a)+f(b) with f(1)=0 and derivative of f at 1 is 1



How can I show that f is continuous on every positive number and



derivative of f is 1x?

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