Applications of Differentiation (HSC SSCE Mathematics Advanced): Flashcards

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Applications of Differentiation
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Point both exe^x & e−xe^{-x} pass through

(0,1)(0, 1)

Type of change y=exy = e^x represents

Exponential growth

Type of change y=e−xy = e^{-x} represents

Exponential decay

Gradient of y=exy = e^x at (0,1)(0, 1)

11

Gradient of y=e−xy = e^{-x} at (0,1)(0, 1)

−1-1

exe^x and e−xe^{-x} graph relationship

Reflections in yy-axis

lim⁡x→∞xe−x\lim_{x \to \infty} xe^{-x}

00 (exponential dominates)

Transformation: replacing xx with −x-x

Reflection in yy-axis

Examples of exponential decay

Radioactive decay, cooling, sound decay, capacitor discharge

Exponential vs polynomial in limits

Exponential dominates polynomial

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