PC(A)_Lesson 1.8 - 1.9 Quiz

Functions can be combined using arithmetic operations and compositions.

• True

• False

Find f(g(x))

• 3x - 16

• 3x - 2

• 3x - 26

• 4x - 2

Find g(f(x)).

• 3x - 16

• 3x - 2

• 3x - 26

• 4x - 2

Find f(g(5)).

• 30

• 242

• 92

• 2

Given the functions...

f(x)=x²+1

g(x)=2x-5

Find f(x)-g(x)

• x²-2x+6

• -x²+2x+4

• -x²-2x-6

• x²-2x-4

Given the functions...

f(x)=x³-3x

g(x)=-4x+1

Find f(x) • g(x)

• -4x³-5x²-3

• -4x³+2x²-3x

• -4x⁴+x³+12x²-3x

• -4x^4-x³+12x²⁺3x

Given the functions...

f(x) = x² - 9

g(x) = x + 3 ,

find f(x) / g(x).

(Don't forget to simplify if you can.)

• x - 3

• x + 3

• x - 12

• x - 6

If f(x) = 2x and g(x) = 2x - 7, find f(x)/g(x).

• (2x - 7)/(2x)

• -7

• (2x)/(2x - 7)

• 1x - 3.5

Tags

CCSS.HSF-BF.A.1B

Given
f(x) = 3x² + 7x and g(x) = 2x² - x - 1, find (f + g)(x).

• 11x² - 1
• 5x⁴ + 6x² - 1
• 5x² + 6x - 1
• 5x² + 8x - 1

Tags

CCSS.HSF-BF.A.1B

Given the function f(x), describe the domain.

• [-3, infinity)

• [0, infinity)

• [3, inifinity)

• (-infinity, 0}