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# Week 9 - Graded Assignment 9 > **Course:** Jan 2026 - Mathematics I > Week 9 - Graded Assignment 9 > **Last Submitted:** You have last submitted on: 2026-04-17, 05:42 IST --- ## Introduction Suppose $f_1(x)= x^3$ and $f_2(x)=x$ denote the profits of Company A and Company B, respectively, throughout 1 year (the beg...

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Week 9 - Graded Assignment 9
Course: Jan 2026 - Mathematics I
Week 9 - Graded Assignment 9
Last Submitted: You have last submitted on: 2026-04-17, 05:42 IST
Introduction
Suppose f1(x)=x3 and f2(x)=x denote the profits of Company A and Company B, respectively, throughout 1 year (the beginning of the year is denoted by x=0 and the ending denoted by x=1). The predicted profits of Company A and Company B in the same year are given by the functions g1(x)=x and g2(x)=ex, respectively. The curves represented by the functions f1 and g1 are shown in Figure M2W3G2, and the curves represented by the functions f2 and g2 are shown in Figure M2W3G3. 

Suppose the area of the region bounded by the two curves (the original curve and the predicted curve) in the interval [0,1]is defined to be the error in prediction.
Using the information above, answer the following questions.
Question 1
Match the functions in Column A with the corresponding (signed) area between its graph and the interval [−1,1] on the X-axis in column B and the images of their graphs and the highlighted region corresponding to the area computed in Column C, given in Table M2W3G1.

- i) → b) → 1), iii) → a) → 2).
- i) → b) → 3), ii) → c) → 1).
- ii) → c) → 1), iii) → a) → 2).
- i) → b) → 1), ii) → c) → 3), iii) → a) → 2).
Feedback/Explanation:
i) → b) → 3), ii) → c) → 1).
ii) → c) → 1), iii) → a) → 2).
Accepted Answers:
i) → b) → 3), ii) → c) → 1).
ii) → c) → 1), iii) → a) → 2).
Question 2
A cylinder of radius x and height 2h is to be inscribed in a sphere of radius R centered at O as shown in Figure M2W3G1

The volume of such a cylinder is given by V=2πx2h and the surface area of the outer curved surface is given by S=4πxh. Choose the set of correct options.
- The cylinder has maximum volume amongst all cylinders which can be inscribed when h=R.
- The cylinder has maximum volume amongst all cylinders which can be inscribed when h=3R.
- The cylinder has maximum volume amongst all cylinders which can be inscribed when h=3R.
- The cylinder has maximum surface area of its curved surface, amongst all cylinders which can be inscribed, when h=2R.
- The cylinder has maximum surface area of its curved surface, amongst all cylinders which can be inscribed, when h=2R.
- The cylinder has maximum surface area of its curved surface, amongst all cylinders which can be inscribed, when h=2.
Status: Yes, the answer is correct.
Score: Score: 1
Feedback/Explanation:
The cylinder has maximum volume amongst all cylinders which can be inscribed when h=3R.
The cylinder has maximum surface area of its curved surface, amongst all cylinders which can be inscribed, when h=2R.
Accepted Answers:
The cylinder has maximum volume amongst all cylinders which can be inscribed when h=3R.
The cylinder has maximum surface area of its curved surface, amongst all cylinders which can be inscribed, when h=2R.
Question 3
Which of the curves in the following figures enclose a negative area on the X axis in the interval [0,1]?

- Curve 1
- Curve 2
- Curve 3
- Curve 4
Feedback/Explanation:
Curve 2
Curve 4
Accepted Answers:
Curve 2
Curve 4
Question 4
What will the absolute difference between the minimum values of f2 and g2 in the interval [0,1] be?
Your Answer:
1Status: Yes, the answer is correct.
Score: Score: 1
Feedback/Explanation:
(Type: Numeric) 1
Accepted Answers:
(Type: Numeric) 1
Question 5
Choose the correct options from the following.
- The error in prediction for company A is 125.
- The error in prediction for company A is 1211.
- The error in prediction for company A is more than that for company B.
- The error in prediction for company B is more than that for company A.
- The error in prediction for Company A and Company B, cannot be compared using the given information.
Status: Yes, the answer is correct.
Score: Score: 1
Feedback/Explanation:
The error in prediction for company A is 125.
The error in prediction for company B is more than that for company A.
Accepted Answers:
The error in prediction for company A is 125.
The error in prediction for company B is more than that for company A.
Question 6
Let f(x)=x3−3x+14. What is the local minimum value of f attained at a critical point?
Your Answer:
12Status: Yes, the answer is correct.
Score: Score: 1
Feedback/Explanation:
(Type: Numeric) 12
Accepted Answers:
(Type: Numeric) 12
Question 7
Let f(x)=28x2+21,0≤x≤6. The estimated area obtained by dividing the interval into 3 sub-intervals of equal length and using the left endpoints of the sub-intervals for the height of the rectangles is (in square units).
Your Answer:
1123Status: Yes, the answer is correct.
Score: Score: 1
Feedback/Explanation:
(Type: Numeric) 1123
Accepted Answers:
(Type: Numeric) 1123
Question 8
Let
What is the global minimum of f on [0,20]
Your Answer:
-46Status: Yes, the answer is correct.
Score: Score: 1
Feedback/Explanation:
(Type: Numeric) -46
Accepted Answers:
(Type: Numeric) -46
Question 9
If x−y=62, find the least value of 2xy.
Your Answer:
-1922Status: Yes, the answer is correct.
Score: Score: 1
Feedback/Explanation:
(Type: Numeric) -1922
Accepted Answers:
(Type: Numeric) -1922