Triple integral - volume

asi123

1. The problem statement, all variables and given/known data

Hey.
I need to find the volume of this integral.
I'm pretty sure I did the second part fine, but I'm really not sure about the jacobian, can I do that?

And another thing, I know I'm asking a lot of question these past few days, but it's only because I have a big test on Sunday

2. Relevant equations



3. The attempt at a solution

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