hi I need to know how to integrate e raised to the negative x. I am confused. :S

- anonymous

hi I need to know how to integrate e raised to the negative x. I am confused. :S

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- chestercat

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- anonymous

hi

- jessica

-e^(-x)

- anonymous

i can help

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## More answers

- anonymous

please! I am learning integration by parts and I let my dv= e^-x. and Im having trouble integrating that.

- anonymous

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

- anonymous

LOST DOVE ARE YOU THERE

- anonymous

yes. but I thought someone here might answer my question :S

- anonymous

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.

- anonymous

LOST DOVE USE ONLINE TUTORING BUT PLZ DONT USE TUTOR NEXT OR TUTROR VISTA U CAN USE GROWING STARS

- anonymous

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

- anonymous

GREAT IDEA

- anonymous

BUT USE ONLINE TUTORING

- anonymous

When thinking of the antiderivative/integral of e^kx, the answer will be 1/k*e^kx

- anonymous

LIKE GROWING STARS

- anonymous

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.

- anonymous

WAIT

- anonymous

its on 1:55 in the video.

- anonymous

USE GROWING STARS ONLINE TUTORING

- shadowfiend

sassy -- again, please stop spamming. lostdove is getting help here at the moment.

- anonymous

I WAS TRYING TO HELP

- anonymous

SORRY

- anonymous

ILL JUST GO

- shadowfiend

I am sure they will keep the advice regarding growing stars in mind if/when it's needed; no need to repeat :)

- anonymous

ohhh i keep replying to sassy thinking shes being legit. lol I'll ignore it
.

- shadowfiend

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.

- anonymous

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.

- anonymous

yeah. I was having trouble keeping up with both convos.

- anonymous

K

- anonymous

SORRY I KEEP ON REPEATING

- anonymous

oh okay!! cool thanks to all for your help! :)
its okay sassy :)

- shadowfiend

No worries sassy :)

- anonymous

THXS GUYS

- anonymous

BYE

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