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Anonymous
Anonymous asked in Science & MathematicsMathematics · 1 decade ago

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???

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  • Ray S
    Lv 7
    1 decade ago
    Favorite 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)

  • Gary
    Lv 5
    1 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)

  • 1 decade ago

    No because e has a different derivative.

  • 1 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)

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