What is the Function f(x) that Satisfies the Given Equation?

[vuth]

f(xy) +f(x-y)+f(x+y+1) = xy+(x-y)+(x+y+1)

find the function f(x) that defines the above equation? can you do it? thanks

 

[colby2152]

f(x) = x, 1-1 relationship here

f(xy) = xy
f(x-y) = x-y
f(x+y+1) = x+y+1