Addition and Subtraction on Function

What is the definition of a function?

• Every input has only one output

• Has inputs and outputs

• Inputs have different outputs every time

• x-values and

  y-values

All of the y values or outputs are called?

• Function

• Relation

• Domain

• Range

 

All of the x values or inputs are called?

• Range

• Domain

• Function

• Relation

When f(x) = x² + 9 and g(x) = x - 9,

find f(x) - g(x).

• x² - x

• x² + x + 9

• x² - x + 18

• x² - x + 9

 

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

find f(x) + g(x).

• 2x - 2

• 14x - 10

• 2x + 2

• -8x + 2

f(x)=5x−12. What is f(-4)?

• 3

• -32

• -12

• -3

Evaluate (g+h)(x), given: g(x)= 2x, h(x) = 5x

• 11x

• 7x

• 3x

• 23x

 

When f(x) = 15 - 3x and g(x) = 5x - 5

find f(x) + g(x).

• 14x - 10

• 2x - 2

• 2x + 10

• -8x + 2

When f(x) = x² + 9 and g(x) = x - 9,

find f(x) - g(x).

• x² + x + 9

• x² - x + 9

• x² - x + 18

• x² - x

f(n)= n² + 4n

g(n)= - n - 5

Find f(n) + g(n)

• n² - 3n - 5

• n² + 3n - 5

• -n³ + 2n - 7

• n³ + 3n - 3n