# View the step-by-step solution to: QSO 510: Module 7 Homework Notes: 1. Before doing this

Notes:
1. Before doing this assignment, do the practice problem posted under Apply and Discover.
2. Word-process your solutions within this template. Do not create a new file.
3. Complete all 7 steps. Place work and answers, below each respective step. Expand the space as needed.
4. Show all steps used in arriving at the final answers. Incomplete solutions will receive partial credit.
5. Word-process formulas using Equation Editor and diagrams using Drawing Tool.

Problem 1
Given y = f(x) = x2 + 2x +3
a) Use the definitional formula given below to find the derivative of the function.

b) Find the value of the derivative at x = 3.

Problem 2
Given, y = f(x) = 2 x3 - 3x2 + 4x +5
a) Use the Power function to find derivative of the function.
b) Find the value of the derivative at x = 4.

Problem 3
The revenue and cost functions for producing and selling quantity x for a certain production facility are given below.
R(x) = 16x – x2
C(x) = 20 + 4x
a) Determine the profit function P(x).
b) Use Excel to graph the functions R(x), C(x) and P(x) for the interval 0≤ x ≤ 12. Copy and paste the graph below. Note: Use Scatter plot with smooth lines and markers.
c) Compute the break-even quantities.
d) Determine the average cost at the break-even quantities.
e) Determine the marginal revenue R’(x).
f) Determine the marginal cost C’(x)
g) At what quantity is the profit maximized?

QSO 510: Module 7 Homework
Notes:
1. Before doing this assignment, do the practice problem posted under Apply and Discover.
2. Word-process your solutions within this template. Do not create a new file.
3. Complete all 7 steps. Place work and answers, below each respective step. Expand the
space as needed.
4. Show all steps used in arriving at the final answers. Incomplete solutions will receive partial
credit.
5. Word-process formulas using Equation Editor and diagrams using Drawing Tool.
Problem 1
Given y = f(x) = x2 + 2x +3
a) Use the definitional formula given below to find the derivative of the function.

f ' (x) = lim

h→0

f (x + h) − f (x)
h

b) Find the value of the derivative at x = 3.
Problem 2
Given, y = f(x) = 2 x3 - 3x2 + 4x +5
a) Use the Power function to find derivative of the function.
b) Find the value of the derivative at x = 4.
Problem 3
The revenue and cost functions for producing and selling quantity x for a certain production
facility are given below.
R(x) = 16x – x2
C(x) = 20 + 4x
a) Determine the profit function P(x).
b) Use Excel to graph the functions R(x), C(x) and P(x) for the interval 0≤ x ≤ 12. Copy and

paste the graph below. Note: Use Scatter plot with smooth lines and markers.
c) Compute the break-even quantities.
d) Determine the average cost at the break-even quantities.

QSO 510: Module 7

1

e)

Determine the marginal revenue R’(x).

f)

Determine the marginal cost C’(x)

g) At what quantity is the profit maximized?

2

QSO 510: Module 7

QSO 510: Module 7 Homework
Notes:

1. Before doing this assignment, do the practice problem posted under Apply and Discover.
2. Word-process your solutions within this template. Do not create a new...

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