Function Operations

When f(x) = 9 - 3x and g(x) = 5x - 7

find f(x) + g(x).

• 14x - 10

• -8x + 2

• 2x + 2

• 2x - 2

When f(x) = x² + 9 and g(x) = x - 9,

find f(x) - g(x).

• x² + x + 9

• x² - x + 9

• x² - x

• x² - x + 18

When f(x) = x² - 9

and g(x) = x + 3 ,

find f(x) / g(x).

• x - 3

• x + 3

• x - 12

• x - 6

f(x)=2x + 4

g(x)=3x² - 1

Find f(x) ⋅ g(x)

• 6x⁴ + 12x³ - 4x² - 8x

• -6x³ + 12x² + 2x - 4

• 6x³ + 12x² - 2x - 4

• 5x² - 18x + 20

f(n)=x² + 1

g(n)=2x - 5

Find f(n) - g(n)

• x² - 2x + 6

• -x² + 2x + 4

• -x² - 2x - 6

• x² - 2x - 4

Given f(x) = -x + 4 and g(x) = 6x + 3, find (f(x) - g(x))

• -7x + 1

• 5x +1

• -5x -1

• 5x + 1

f(n)= 2n + 1

g(n)= 3n

Find f(n) + g(n)

• 5n + 1

• -5n + 1

• -2n + 1

• -6n - 1

f(x)= x+3

g(x)= x-2

Find (g(x) / f(x))

Be careful!!

• (x + 3)/(x - 2)

• (x - 2)/(x + 3)

• -2/3

• 3/2

f(x)= x² - 1

g(x)= x - 1

Find (f(x)/g(x))

Then simplify using x = 10

• 9

• 11

• 90

• 110

What is the value of f(0)?

• -2
• 2
• 4
• 0