1. find value

if f(x)*f(y)+2=f(x)+f(y)+f(xy) for every x belonging to R and f(1)=f(first differential)(1)=2 then f(2) is equal to

i treated y as constant and differentiated with respect to x

should i follow the basic method of differentiation by using limits

2. Re: find value

I wish that made any sense at all. Can you learn just enough LaTeX to communicate better? Perhaps the actual text to the problem statement?

3. Re: find value

Originally Posted by prasum
if f(x)*f(y)+2=f(x)+f(y)+f(xy) for every x belonging to R and f(1)=f(first differential)(1)=2 then f(2) is equal to
i treated y as constant and differentiated with respect to x
should i follow the basic method of differentiation by using limits
As the above reply indicates your refusal to learn LaTeX makes many of us not take your posting seriously.
Why not learn to post in symbols? You can use LaTeX tags