Question

Given
f(x) = 3x + 10 and g(x) = x - 2, find f (g(5))
-10
23
None of these.

Answer 1

Answer: None of these

Explanation:

f(g(5)) first let’s find g(5)

We know:
g(x) = x - 2
g(5) = 5 - 2
g(5) = 3

Thus, f(g(5)) = f(3) because g(5) = 3

=> f(3) = 3(3) + 10
=> f(3) = 9 + 10
=> f(3) = 19

Therefore, f(g(5)) = 19

Answer 2

Solution :-

Provided :-

• f(x) = 3x + 10

• g(x) = x - 2

We have to find out

• f(g(5))

Replace g(x) = x - 2 , here x = 5

= f( (5) - 2)

= f(3)

Replace f(x) = 3x + 10 , here x = g(x) = 3

= 3(3) + 10

= 9 + 10

= 19