Let f : R → R : f(x) = x2 + 2 and find f o g and g o f and hence find (f o g) (2) and (g o f) (-3).
To find: f o g, g o f ,(f o g) (2) and (g o f) (-3)
Formula used: (i) f o g = f(g(x))
(ii) g o f = g(f(x))
Given: (i) f : R → R : f(x) = x2 + 2
f o g = f(g(x))
Ans) = 6
g o f = g(f(x))
⇒ g(x2+2)