Microsoft Word - MTH231- written assignment 5_ Claiborne working Copyright © 2021 by Thomas Edison State University. All rights reserved. Back to Top What height allows you to have the largest volume?...

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Answer To: Microsoft Word - MTH231- written assignment 5_ Claiborne working Copyright © 2021 by Thomas Edison...

Anil answered on Aug 10 2021
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Module 12
Que 1 Determine the area of the region between the two curves by integrating over
the y-axis.
? = ?2, ??? ? = 9
Answer:
First let’s find out intersection points.
? = ?2, ??? ? = 9
?2 = 9 ⇒ ? = ±3
So, inter
section points are (9, −3) and (9,3)
Now,
???? = ∫ [?(?) − ?(?)]??
?
?

= ∫ (9 − ?2)??
3
−3

= [9? −
?3
3
]
−3
3

= 36 ??. ????
Que 2. Graph the equations and shade the area of the region between the curves.
Determine its area by integrating over the x-axis.
? = ??, ? = ?2?−1, ??? ? = 0
Answer:
? = ?? , ? = ?2?−1
⇒ ?? = ?2?−1
? = 1
? = ?? ? = ?2?−1
???? = ∫ (
1
0
?? − ?2?−1) ??
= [?? −
?2?−1
2
]
0
1

=
?
2
− 1 −
1
2?

=
(? − 1)2
2?
Que 3. Graph the equations and shade the area of the region between the curves.
Determine its area by integrating over the x-axis.
? = ?, ? = ?? , ??? ? = ?−?
Answer:
???? = ∫ (? − ?−?)??
0
−1
+ ∫ (? − ??)??
1
0

= [? ? + ?−?]−1
0 + [? ? − ??]0
1
= [1 − ? + ?] + [? − ? + 1]
= 2 ??. ????
Que 4. Graph the equations and shade the area of the region between the curves. If
necessary, break the region into subregions to determine its entire area.
? = ?2 + 9, ??? ? = 10 + 2?, ???? ? = [−1,3]
Answer:
First let’s find out intersection point,
? = ?2 + 9, ??? ? = 10 + 2?
?2 + 9 = 10 + 2?
?2 − 2? − 1 = 0
? = 1 ± √2
So,
???? = ∫ (?2 + 9 − 10 − 2?)
1−√2
−1
?? + ∫ (10 + 2? − ?2 − 9)
1+√2
1−√2
??
+ ∫ (?2 + 9 − 10 − 2?)
3
1+√2
??
= ∫ (?2 − 1 − 2?)
1−√2
−1
?? + ∫ (1 + 2? − ?2)
1+√2
1−√2
?? + ∫ (?2 − 1 − 2?)
3
1+√2
??
= [
?3
3
− ? −
2?2
2
]
−1
1−√2
+ [−
?3
3
+ ? +
2?2
2
]
1−√2
1+√2
+ [
?3
3
− ? −
2?2
2
]
1+√2
3
=
8
3
[2√2 − 1]
Que. 5 Graph the equations and shade the area of the region between the curves.
Determine its area by integrating over the x-axis or y-axis, whichever seems more
convenient
? + ?3 = ? ??? 2? = ?
Answer:
???? = ∫ (? + ?3 − 2?)??
0
−1
+ ∫ (2? − ? − ?3)??
1
0

= ∫ (?3 − ?)??
0
−1
+ ∫ (? − ?3)??
1
0

= [
?4
4

?2
2
]
−1
0
+ [−
?4
4

?2
2
]
0
1

=
1
2
= 0.5 ??. ????
Que. 6 Find the exact area of the region bounded by the given equations if possible.
If you are unable to determine the intersection points analytically,...
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