(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

[PLAIN]http://img413.imageshack.us/img413/6839/49887281.gif [Broken]

3. The attempt at a solution

(a)

du=4x^{3}dx

[tex]\int^b_{a} f(x^4)dx= \int^{1^4}_{(-1)^4} 1+u \frac{du}{4x^3}[/tex]

So, why does the method break down? Is it because a=b=1 (it should've beena < b)?

(b)What does it mean for the Jacobian [tex]\frac{du}{dx}[/tex] to "vanish"? And how do we find this point?

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# Homework Help: Double Integrals

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