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i can help
please! I am learning integration by parts and I let my dv= e^-x. and Im having trouble integrating that.
just go to fun math.com and ask or try online tutoring but DONT AND I REPEAT DONT USE TUTOR VISTA OR TUTOR NEXT BUT TRY GROWING STARS
LOST DOVE ARE YOU THERE
yes. but I thought someone here might answer my question :S
Whenever you take the derivative of e^x, it's e^x. If you take the derivative e^kx where k is a constant, the derivative is ke^kx.
LOST DOVE USE ONLINE TUTORING BUT PLZ DONT USE TUTOR NEXT OR TUTROR VISTA U CAN USE GROWING STARS
Make sure you think of e^-x as e^-1x. Each time you take the derivative, the sign will change. That's why -e^-x will derive to e^-x
BUT USE ONLINE TUTORING
When thinking of the antiderivative/integral of e^kx, the answer will be 1/k*e^kx
LIKE GROWING STARS
i'll give the funmath thing a try though (thx! :)). wait let me read dwobinkles reply. okay but im watching this video and the guy took the derivative of it, and he got -e^-x. http://www.youtube.com/watch?v=dqaDSlYdRcs which is why I am confused.
its on 1:55 in the video.
USE GROWING STARS ONLINE TUTORING
sassy -- again, please stop spamming. lostdove is getting help here at the moment.
I WAS TRYING TO HELP
ILL JUST GO
I am sure they will keep the advice regarding growing stars in mind if/when it's needed; no need to repeat :)
ohhh i keep replying to sassy thinking shes being legit. lol I'll ignore it .
Oh, I'm sure sassy is trying to help. Just trying to let you also interact with dwobwinkle who is giving a good answer to your original question.
google "paul's online math notes". It's a website created by a professor, it's gotten me through calculus. It's free, not a tutoring site like Sassy is saying (lots of money, unexpected results). He has his lecture notes online and explains everything taught from algebra all the way through differential equations.
yeah. I was having trouble keeping up with both convos.
SORRY I KEEP ON REPEATING
oh okay!! cool thanks to all for your help! :) its okay sassy :)
No worries sassy :)