Function Operations

Question 1

If f(x) = 3 – 2x and , what is the value of ?

Revolt · Accepted Answer

–169

Question 2

The graphs of f(x) and g(x) are shown below. For what interval is the value of (f – g)(x) negative?

Revolt · Accepted Answer

(negative infinity, 2)

Question 3

If r(x) = 3x – 1 and s(x) = 2x + 1, which expression is equivalent to ?

Revolt · Accepted Answer

StartFraction 3 (6) minus 1 Over 2 (6) + 1 EndFraction

Question 4

If f(x) = 8 – 10x and g(x) = 5x + 4, what is the value of (fg)(–2)?

Revolt · Accepted Answer

–168

Question 5

If f(x) = 4 – x2 and g(x) = 6x, which expression is equivalent to (g – f)(3)?

Revolt · Accepted Answer

6(3) – 4 + 32

Question 6

Which expression is equivalent to (f + g)(4)?

Revolt · Accepted Answer

f(4) + g(4)

Question 7

If and , what is the value of (f – g)(144)?

Revolt · Accepted Answer

0

Question 8

Which expression is equivalent to ?

Revolt · Accepted Answer

f (5) times g (5)

Question 9

If f(x) and g(x) are quadratic functions but (f + g)(x) produces the graph below, which statement must be true?

Revolt · Accepted Answer

The leading coefficients of f(x) and g(x) are opposites.

Question 10

If p(x) = x2 – 1 and , which expression is equivalent to (p – q)(x)?

Revolt · Accepted Answer

(x2 – 1) – 5(x – 1)

Function Operations Answers