Question

3. Given f ( x ) = x2 + 1 and g ( x ) = x – 4 , find ( f g ) ( x ) and ( f g ) ( 3 ).

Answer 1

=19 !!!!!!!!!!!!!!

Explanation:

Answer 2

Answer: = -10

Explanation:

Step 1. Solve for ( f g ) ( x ).

`Since ( f g ) ( x ) = f ( x ) * g ( x ) , then`

`= (x^2 + 1 ) ( x - 4 )\\= x^3 - 4 x^2 + x - 4`

Step 2. Find ( f g ) ( 3 )

`Since ( f g ) ( x ) = x^3 -4 x^2 + x -4, then`

`\\( f g ) ( 3 ) = (3)^3 -4 (3)^2 + (3) -4\\= 27 -36 + 3 -4\\ = -10`