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calculus..... derivative!!!!?
i'm no good at calculus.... i mean i try but i either dont get it at all or get it way after evry1 else. in class we're learnin derivative's of e and i don't know how to find the dertivative of e^ax if a is constant! i know e^x is just e^x, and dont constants have a derivative of 0??? so is the answer just e???
5 Answers
- Ray SLv 71 decade agoFavorite Answer
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The general formula for determining the derivative of eᵘ where u is a function of x is:
d eᵘ
—— = eᵘ(du/dx)
dx
You have eªˣ so that u = ax ⇒ du/dx = a
By the formula, then:
d eᵘ d eªˣ
—— = ——— = eªˣ·a = aeªˣ ← ANSWER
dx dx
————————————————————————————————————
Note:
If you apply this formula to eˣ, then u = x so that
d eᵘ d eˣ
—— = ——— = eˣ·(dx/dx) = eˣ·1 = eˣ
dx dx
Hope that helps
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- 1 decade ago
The derivate is ae^(ax). You can find this using chain rule. To use chain rule you take the dervative of the e as if the a isn't there and then multiply the whole thing by the derivate of the ax.
d/dx of e^(ax) = e^(ax) *(d/dx of ax) = ae^(ax)
- GaryLv 51 decade ago
The derivative is e^(ax) multiplied by the derivative of the exponent. The derivative of ax is a, so the derivative is ae^(ax)
- MathmomLv 71 decade ago
General rule for derivative of exponent function (using chain rule):
d/dx (e^(f(x)) = e^(f(x)) * f'(x)
d/dx (e^(ax)) = e^(ax) * d/dx (ax)
. . . . . . . . . . = e^(ax) * a
. . . . . . . . . . = a e^(ax)