Unit 6 Review - Alg 2H

(f + g) (x)

• 5x² + 3x

• 4x² + 3x

• 5x² - 3x

• 4x² - 40x

(f - g)(x)

• 5x² + 3x

• -3x² - 13x

• 3x² + 3x

• -3x² + 3x

Given f(x) = 3x² - 2x + 1 and g(x) = x - 4, find (f⋅g)(x). 

• 3x³ - 10x² - 7x - 4
• 3x³ - 14x² + 9x - 4
• 3x² - x - 3
• 3x³ + 14x² - 9x - 4

• -14/55

• 14/55

• 2

• -2

If f(x) = 3x-1 and g(x) = x²+2,

what is (f ° g)(x) ?

• 3x² +5

• x² +1

• 3x² +1

• 3x² +6

f(x) = 3x + 10
g(x) = x - 2
Find f(g(5))

• 19
• 23
• -10
• None of these.

Find g(- 2).

• 12

• -2

• -24

• 18

For f(x) = 2x²-1, what is and (f ° f)(-2) ?

• 7

• 97

• 13

• 6

Given f(x) = x² - 3 and g(x) = x - 3, find f(g(f(3))).

• 0
• 3
• 6
• 9

The inverse of the function f(x) is written as ...

• f ^-1(x)
• f ²(x)
• f '(x)
• f ⁺(x)