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#1 2008-11-23 17:37:09

Syed Arsalan
Guest

Double Integral

Evaluate the following iterated integral if region of integration R is bounded by graphs of  y = x² and y = 2x.   
∫ ∫ (x³+4y)dydx

#2 2008-11-25 16:07:19

macy
Guest

Re: Double Integral

1. Sketch two graphs on the same x-y plane, we get the two intercepts points (0,0) and (2,4)
2. The boundary for the inside integral is from x^2 to 2x. Take the inside integral wrp to y, treat x as constant.
3. Subsitute the value of the boundary into the resulted expression to get the result
4. Take the outside integral of that result wrp to x with the boundary is from 0 to 2.

#3 2008-11-25 17:37:22

macy
Guest

Re: Double Integral

The answer for you to double check your work

1. The resulted expression after taking inside integral is 8x^2 - 2x^4

2. The final answer is 128/15

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