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https://web2.0calc.com/questions/help-please_89887

 May 28, 2020
 #1
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Written clearly in the answer.

 

Guest said, see if f(x) = x works.

 

It means, see if f(x) = x is a valid solution.

 May 28, 2020
 #2
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Okay, but how does that help? Let's say f(x)=x

Then, x*f(y)=f(x+y)+f(x)*y

Guest May 28, 2020

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