How could I find the volume between the curves y= e^3 and y=x , rotated about the x-axis? Should I be using the disk/washer method or the cylindrical method?

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- May 6th 2011, 09:20 AMcolerelm1Finding volume between curves
How could I find the volume between the curves y= e^3 and y=x , rotated about the x-axis? Should I be using the disk/washer method or the cylindrical method?

- May 6th 2011, 09:45 AMAckbeet
As stated, your problem doesn't make any sense. e^3 is a constant. So you have the straight line y = e^3, and the straight line y = x. Those are intersecting straight lines - they don't enclose any area. Could you please re-state the problem precisely?

- May 6th 2011, 09:48 AMcolerelm1
oops, i meant e^(3x^2) instead of e^3

- May 6th 2011, 09:51 AMAckbeet
Do you have an interval for this solid of revolution? Those two curves don't intersect. However, if you have a y or x interval, then we can proceed.