F (g (x)) = x+1 และ f (x) = x-1 หาg (x)

Let's do this: start with f (x) = x - 1. Now substitute the label "g (x) " for x:

f (g (x)) = g (x) - 1 and we are told that f (g (x)) equals x + 1.

Thus, g (x) - 1 = x + 1

Adding 1 to both sides, we get

g (x) = x + 2 (answer)