Hi, Can anyone check for me if I did right or wrong?

Question: Under the surface z=8xy and above the triangle with vertices (1,1), (4,1), and (1,2) Find the volume of the given solid.

I did:

#### Top Answer

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- Is there any difference between dxdy and dydx?
- LorraineLian
- May 13, 2018 at 8:36pm

- hi... the answer is 31.. as its 8xy... i forgt 8......
- SravyaVidya
- May 13, 2018 at 8:42pm

- no...dydx and dxdy are same.. the point is x limits are 1 to 7-3y.... you wrote 8-3y
- SravyaVidya
- May 13, 2018 at 8:43pm

- So if I wrote 7-3y than my steps are right?
- LorraineLian
- May 13, 2018 at 8:45pm

- yes.. when you wrote 7-3y you will also get the same 31 answer
- SravyaVidya
- May 13, 2018 at 9:27pm

- ok,thank you so much. I will check it!
- LorraineLian
- May 13, 2018 at 9:34pm