Integration By Parts Help

So I just wanted to see if someone could check my work on only the integration by parts of this problem to make sure I did it correctly. I have attached a file... if not what was my mistake.

Question

Integration By Parts Help

So I just wanted to see if someone could check my work on only the integration by parts of this problem to make sure I did it correctly. I have attached a file... if not what was my mistake.

anonymous · Answer

attachment

anonymous · Answer

Like I said, don't worry about the first part of the problem and that work, I just want to make sure that the integration by parts work is correct.  :-)

empty · Answer

Looks good to me, just left out a ton of dxs everywhere lol.

anonymous · Answer

pshhh who needs those, haha.  good appreciate the look. :-)

empty · Answer

Well it's useful if you're looking at probability density functions over multiple variables lol. But there's probably a better way to do this problem than to use integration by parts by the way.

anonymous · Answer

ya.. i believe i can use the cumulative distribution function.  Integrate from 0 to x of f(t).. but then I am not to sure what to do after that.