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# Math help please ! - double integral

Not sure if i have done this question right i would appreciate anyone who could solve it for me who is good at math and let me know what answer you get !.....

and yes i have used wolframalpha but i am a bit sceptic on wether i have inputed it correctly etc.

I get a negative exponential btw

and yes i have used wolframalpha but i am a bit sceptic on wether i have inputed it correctly etc.

I get a negative exponential btw

Original Poster

Original Poster

haha , mechanical engineering believe it or not !:w00t: :thinking:

I didn't use wolframalpha, I guessed.

:P

Do you not treat the two integration bits seperately and then multiple the answers from the 2 collecting like terms etc.

Original Poster

yup correct, however in the lecture the examples give gave simple answers lik 28/3 etc. for this i get ( - 1673895616/ 165 ) :w00t: so i am a bit unsure if i am doin it correct, my mate gets totally different answers from me so would like another outside opinion

i remember having an argument with my maths teacher many moons about algerbra & i said to him i'd never need to use it & i was right !

hth

yeah :thinking: :?

Original Poster

done that but its the value i want incase my basic maths fails me like it usually does :roll:, it looks like somone else tried it and got the same as me so im happy with that