Question

For all values of x,

f(x) = x + 1
and
g(x) = x2-3

a) Find f(3)

b) Find gf(3)​

Answer 1

(a) f(3) = 4

(b) gf(3)​ = 13

Explanation:

Given;

f(x) = x + 1

g(x) = x² - 3

(a) Find f(3);

f of 3 is calculated as;

f(3) = (3) + 1

= 4

(b) Find gf(3)​;

g of f of 3 is calculated as;

f(3) = 4

gf(3) = (4)² - 3

= 16 - 3

= 13