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

Evaluate the triple integral of e**-(x**2 + 2y**2 + 3z**2), all of the limits are from -infinity to infinity.

2. Relevant equations

3. The attempt at a solution

I'm not really sure how to do this problem. I know I have to change the coordinate system, but what to? I tried cylindricals, but it didn't seem right, unless I made a mistake there. Or do i have have to use spherical coordinates, which I am reading up on right now. Any help would be great.

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# Evaluate triple integral, involves e -(x 2)

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