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Find the volume of the solid obtained by rotating the region bounded by
x=8 y^2, y = 1, x = 0, about the yaxis.
a) 8 y^2=0, x=0, how can I solve this when its like this, I mean there's no other x values so i can use the (0, ?)∫.
I'm using this V = π ∫ f(x)² dx {a,b}
 one year ago
 one year ago
Find the volume of the solid obtained by rotating the region bounded by x=8 y^2, y = 1, x = 0, about the yaxis. a) 8 y^2=0, x=0, how can I solve this when its like this, I mean there's no other x values so i can use the (0, ?)∫. I'm using this V = π ∫ f(x)² dx {a,b}
 one year ago
 one year ago

This Question is Closed

klimenkovBest ResponseYou've already chosen the best response.1
dw:1351976458012:dw
 one year ago

UnamBest ResponseYou've already chosen the best response.0
What's the graph between? 0 to 8 or 0 to 1?
 one year ago

klimenkovBest ResponseYou've already chosen the best response.1
You can't use this formula in this case.
 one year ago

klimenkovBest ResponseYou've already chosen the best response.1
dw:1351976777364:dw And now you can. Calculate this integral and it will be the volume.
 one year ago

UnamBest ResponseYou've already chosen the best response.0
thanks so down we... v= π (0,1) ∫(8x^2)^2 dx(8x)^2π?
 one year ago

klimenkovBest ResponseYou've already chosen the best response.1
Can't understand you, just calculate the integral I've written. And it will be the volume. Can you do this?
 one year ago

klimenkovBest ResponseYou've already chosen the best response.1
You can type the result and I will check it.
 one year ago

klimenkovBest ResponseYou've already chosen the best response.1
Yes. That's correct.
 one year ago

UnamBest ResponseYou've already chosen the best response.0
so I just use 1 and 0 for ∫?
 one year ago

UnamBest ResponseYou've already chosen the best response.0
i know how i get 0 but not sure about 1, we use the graph right? cos its not between 0 and 1?
 one year ago

klimenkovBest ResponseYou've already chosen the best response.1
You need to understand how the formula is built to get how to solve this problem. I just switch x and y, so you can use your formula.
 one year ago

klimenkovBest ResponseYou've already chosen the best response.1
If you will rotate the area on my second figure about xaxes you will get the volume i drew on the first figure. Got it?
 one year ago
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