Differentiation of Exponential Functions (HSC SSCE Mathematics Advanced): Quizzes

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Differentiation of Exponential Functions
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What is the unique property of the exponential function exe^x when differentiated?

Its derivative equals itself

What is dydx\frac{dy}{dx} if y=5e4x−3y = 5e^{4x-3}?

20e4x−320e^{4x-3}

When differentiating exponential functions, when should you use the chain rule?

When exponent is more complex than linear

What is dydx\frac{dy}{dx} for y=e1−x2y = e^{1-x^2} using the chain rule?

−2xe1−x2-2xe^{1-x^2}

Which formula represents the chain rule for exponential functions?

ddxeu=eududx\frac{d}{dx}e^u = e^u\frac{du}{dx}

For y=x3exy = x^3e^x, what is dydx\frac{dy}{dx} after factorising?

x2ex(3+x)x^2e^x(3 + x)

Why is the fact that exe^x is never zero important when finding stationary points?

It simplifies solving dydx=0\frac{dy}{dx} = 0

Using the quotient rule for y=e5xxy = \frac{e^{5x}}{x}, what is dydx\frac{dy}{dx} after factorising?

e5x(5x−1)x2\frac{e^{5x}(5x - 1)}{x^2}

When using quotient rule, what must equal zero to find stationary points?

The numerator only

For y=xe5x−2y = xe^{5x-2}, at what xx-value does a stationary point occur?

x=−15x = -\frac{1}{5}

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