Question:
help please d/dx (e^-ax^2) = ?
sikele
2010-12-19 07:27:25 UTC
d/dx (e^-ax^2) = (-ax^2)' * ( e^-ax^2) ? is it like d/dx (e^ax )= a * e^ax?
Eight answers:
TheJoker
2010-12-19 07:30:03 UTC
d/dx (e^-ax^2) = (-2ax)*e^(-ax^2)



When you take derivative of e^n, you have to take derivative of n power with respect to whatever variable then ask for and then multiply it by original e^n. Hope that helps.
David Nuttall
2010-12-19 13:19:43 UTC
Sometimes you need to apply the chain rule multiple times. Derivative of the outside times the derivative of the inside; keep going until you run out of insides.



d(e^[-ax^2])/dx = e^(-ax^2)*(-2ax)
Forever
2010-12-19 07:39:32 UTC
AS d/dx (e^-ax^2)



=(e^-ax^2) into d/dx (-ax^2)



=(e^-ax^2) into [-a d/dx(x^2)]



=(e^-ax^2) into [-a (2x)]



= -2ax(e^-ax^2)



Regards,

S. Faheem
fast-as-lightening
2010-12-19 07:39:09 UTC
how about using ln() function... cause thats the inverse of e.

then you use the:

y = ln(x)

dy/dx = f '(x)/f(x)

or you can use the y = e^x then.. f ' (x)e^(f(x))



making it: -2ae^(-ax^2)
bonobo
2010-12-19 07:40:24 UTC
         d { eʷ } ⁄ dx = eʷ • (dw ⁄ dx)



w = -a x²

dw ⁄ dx = - 2 a x



         d { eʷ } ⁄ dx = e^(-a x²) • (- 2 a x)



              = (- 2 a x) • e^(-a x²)
Engr. Ronald
2010-12-19 07:41:38 UTC
y=e^(-ax^2)

dy/dx=-2axe^(-ax^2) answer//
MechEng2030
2010-12-19 07:48:16 UTC
= -2ax*e^(-ax²)
anonymous
2010-12-19 07:32:32 UTC
hmmmm....tough question......


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