Determine if the two functions are inverses of each other.

f(x) = x - 3, g(x) = x + 3
To determine if these two functions are inverses of each other, they can be converted back to the others form.
f(x) = x-3
x = g(x)-3
x +3 = g(x) -3 +3
x + 3 = g(x)
These two equations are inverses of each other.
More Examples