Operations with functions math 3

Given

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

(a)  

• 11x² - 1

• 5x⁴ + 6x² - 1

• 5x2 + 6x - 1
• 5x² + 8x - 1

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

When f(x) = x² + 9 and g(x) = x - 9,

find f(x) - g(x).

(a)  

• x² + x + 9

• x² - x + 9

• x² - x

• x2 - x + 18

f(x)=2x + 4

g(x)=3x² - 1

Find f(x) ⋅ g(x)

(a)  

• 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 h(x) = 2x- 1
and g(x) = 3x + 4, find (4h - 3g)(x).

• -x - 5
• -x -16
• -x + 5
• -x + 16

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

• 39
• -27
• -23
• -19

• 160

• 100

• 28

• 6

All of the x values or inputs are called what?

• Domain
• Range
• Relation
• Function