I am confused on how to set up the problem. At first I was thinking of doing cylinder form, but it has been a while and I don’t remember how to actually set it up. Would disk method work too?
#Find Volume of the solid generated rotated at the specified ooint.
stoic summit
crimson krakenBOT
keen ore
I am confused on how to set up the problem. At first I was thinking of doing cyl...
wait are you not supposed to use the disk method
stoic summit
I think I should. The wording confused me. I know you can use cylinder regardless, and is just a matter of what is easier.
keen ore
wait
I forgot the formula for the disk method
it was pi times the integral of something
the only help I have is to use the disk method
ok wait
@stoic summit did you get your answer
stoic summit
Yeah, but is not the right one. I got 4103pi/15, and the answer sheet says it is 1088pi/15
keen ore
Yeah, but is not the right one. I got 4103pi/15, and the answer sheet says it is...
oh I got 92pi/15
keen ore
Yeah, but is not the right one. I got 4103pi/15, and the answer sheet says it is...
wait were you integrating from -2 to 2
stoic summit
No, from 4 to 5.
keen ore
oh
stoic summit
Oh wait, I just realized it has the section of the book. Maybe they took an example from it, going to check it.
keen ore
ok
stoic summit
Cannot find.
At least I know it is washer method because the cylinder method is a different section of the book.
I don’t think there are any problems to my set up.
keen ore
hey @stoic summit what is the name of the book you are using
keen ore
alright ty
yeah I am also completely lost on how to solve this problem
I wish you the best of luck in deriving the answer
stoic summit
Thanks lol.
heady talon
u should account for the y = 5 by subtracting the function from it, since it is shifted
stoic summit
u should account for the y = 5 by subtracting the function from it, since it is ...
OH YEAH!
Ahhhh
Where exactly do I plug in the 5?
heady talon
put it in front of the function (5 - 4 - x^2)
if it were negative youu would just add it
stoic summit
put it in front of the function (5 - 4 - x^2)
Weird, it still doesn’t give me the answer.
keen ore
u should account for the y = 5 by subtracting the function from it, since it is ...
aren't you supposed to subract 5 from the function
wait nvm
keen ore
put it in front of the function (5 - 4 - x^2)
the x^2 term should be positive because when you subtract the function from 5, you get 5-(4-x^2), which results in 1 + x^2
stoic summit
Tried to integrate from 0 to 4, and 0 to 5 but still not the answer from the answer sheet.
keen ore
Tried to integrate from 0 to 4, and 0 to 5 but still not the answer from the ans...
try integrating from -2 to 2
cuz (2,0) and (-2,0) are the intersections with the graph of the x axis and 4-x^2
heady talon
the x^2 term should be positive because when you subtract the function from 5, y...
i know i should havei ncluded the parenthetical argument
keen ore
i know i should havei ncluded the parenthetical argument
ok my bad
stoic summit
Still no ida how to solve this 💀