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anonymous
 3 years 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}
anonymous
 3 years 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}

This Question is Closed

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1351976086595:dw

klimenkov
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1351976458012:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0What's the graph between? 0 to 8 or 0 to 1?

klimenkov
 3 years ago
Best ResponseYou've already chosen the best response.1You can't use this formula in this case.

klimenkov
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1351976777364:dw And now you can. Calculate this integral and it will be the volume.

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

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

klimenkov
 3 years ago
Best ResponseYou've already chosen the best response.1You can type the result and I will check it.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0so I just use 1 and 0 for ∫?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1351977717019:dw

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

klimenkov
 3 years ago
Best ResponseYou've already chosen the best response.1You 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.

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