Quiz about Operations on Functions

Question 1

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

Accepted Answer

5x² + 6x - 1

Answer

11x2 - 1

Answer

5x⁴ + 6x² - 1

Answer

5x² + 8x - 1

Question 2

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

Accepted Answer

x² + 8x + 1

Answer

x² + 6x - 1

Answer

5x² + 8x - 1

Answer

x² + 8x -1

Question 3

Given f(x) = 3x² - 2x + 1 and g(x) = x - 4, find (f*g)(x).

Accepted Answer

3x³ - 14x² + 9x - 4

Answer

3x³ - 10x² - 7x - 4

Answer

3x² - x - 3

Answer

3x³ + 14x² - 9x - 4

Question 4

Given f(x) = x² + 5 and g(x) = 2x³ - 1,
find (f/g)(-3).

Accepted Answer

-14/55

Answer

14/55

Answer

2

Answer

-2

Question 5

$$g\left(x\right)\ -\ h\left(x\right)$$

Accepted Answer

$$3x\ -\ 8$$

Answer

$$x-8$$

Answer

$$3x\ -\ 10$$

Answer

$$x\ -\ 10$$

Question 6

Find f(x) - g(x)

Accepted Answer

-x² - 7x + 2

Answer

x² - 7x + 2

Answer

-x² + 7x + 2

Answer

-x² - 7x + 4

Question 7

Find f(x) - g(x)

Accepted Answer

2x² + 8x - 8

Answer

3x² + 8x - 8

Answer

2x² + 8x + 8

Answer

2x² + 4x - 8

Question 8

Find f(2) if f(x)= 3x-9

Accepted Answer

-3

Answer

0

Answer

2

Answer

3

Question 9

Find f(3) + g(2) if f(x)= x+2 and g(x)=5x-1

Accepted Answer

14

Answer

2

Answer

5

Answer

9

Question 10

Find (f-g)(2)
if f(x)=4x+10 and g(x)=3x-7

Accepted Answer

19

Answer

18

Answer

-1

Answer

17

Question 11

If g(x) = 6x + 4 and
f(x) = 2x - 7
Find f(x) * g(x)

Accepted Answer

12x² - 34x - 28

Answer

8x - 3

Answer

4x + 11

Answer

12x2 - 28

Question 12

f(n)=2n+1
g(n)=3n
Find f(n)+g(n)

Accepted Answer

5n+1

Answer

-5n+1

Answer

-2n+1

Answer

-6n-1

Question 13

f(x)=2x+4
g(x)=3x²-1
Find f(x)*g(x)

Accepted Answer

6x³+12x²-2x-4

Answer

6x⁴+12x³-4x²-8x

Answer

-6x³+12x²+2x-4

Answer

5x²-18x+20

Question 14

Question 14.

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 15

Question 15.

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 16

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

Accepted Answer

5x² + 6x - 1

Answer

11x2 - 1

Answer

5x⁴ + 6x² - 1

Answer

5x² + 8x - 1

Question 17

Find f(2)

Accepted Answer

5

Answer

4

Answer

3

Answer

0

Question 18

Find f(-1)

Accepted Answer

-3

Answer

15

Answer

19

Answer

17

Question 19

Question 19.

Accepted Answer

D

Answer

A

Answer

B

Answer

C

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