Sunday, May 4, 2008

#22 and 23 from MC Set #2

For #22, how does the answer come out to be e? I keep 2+e, which is the answer for choice C. Does anyone know how to do this?

For #23, I don't understand this problem either. Any help would be greatly appreciated..

Thanks.

5 comments:

Anonymous said...

Okay I know Maria got this but in case anyone else needs 22 (or 13, for that matter) I typed this up for a friend and here is what I typed up for him.

http://img522.imageshack.us/img522/8826/mathwo7.gif

Anonymous said...

That's a ".gif" file, by the way. It doesn't show up on my computer so yeah.

Anonymous said...

Okay for number 23, I had my friend help me with this. He recognized the series as xsinx, so plug that in and you get the integral of xsinx from 0 to pi. Use integration by parts or tabular integration and you should get -xcosx+sinx from 0 to pi. And thus, you get pi as your answer.

MariaCJen said...

Thanks so muchhhhh!!!! :D

Jennifer Oh said...

Thanks Amy!! I needed help on those too.