Question

Let f and g be functions from R to R as follows. Find fog, gof, fof, gog:-

(1) f(x) = x + 1,

g(x) = x-1​

Answer 1

Answer:

x, x, x+2, x-2 respectively. :)

Step-by-step explanation:

fog = f(g(x)) = x-1 +1 = x

gof = g(f(x)) = x+1 -1 = x

fof = f(f(x)) = x+1 +1 = x+2

gog = g(g(x)) = x-1 -1 = x-2