Given: S10.re", f(r) = 2r+3r2- 12r, r20 I<0 a. Find all the eritical numbers of f. b. Find the extreme values of f on [-2, 2]. [Hint: e2.71]
Given: S10.re", f(r) = 2r+3r2- 12r, r20 I<0 a. Find all the eritical numbers of f. b. Find the extreme values of f on [-2, 2]. [Hint: e2.71]
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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need help asap :(
![Given:
10re",
| 2r3 +3r2- 12r, r20
I<0
f(r) =
a. Find all the critical numbers of f.
b. Find the extreme values of f on [-2, 2). [Hint: ez 2.71]
A solid right cylindrical cement block of volume 97 ft is to be made, and then painted except
for the base. The cost of painting the top and sides are $3 per ft? and $9 per ft², respectively.
Find the least possible cost of painting the cement block.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe99332b6-cf2c-48bf-b91b-57224a4d7430%2Fb5fcc91f-59d2-42f7-a140-f4377078a516%2Fsd8c8o8_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Given:
10re",
| 2r3 +3r2- 12r, r20
I<0
f(r) =
a. Find all the critical numbers of f.
b. Find the extreme values of f on [-2, 2). [Hint: ez 2.71]
A solid right cylindrical cement block of volume 97 ft is to be made, and then painted except
for the base. The cost of painting the top and sides are $3 per ft? and $9 per ft², respectively.
Find the least possible cost of painting the cement block.
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