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Mathematical Methods Β· Unit 2 Β· Introduction to differential calculus Β· Rates of change and the concept of derivatives

Use the rule 𝑓′(π‘₯) = lim β„Žβ†’0 𝑓(π‘₯+β„Ž)βˆ’π‘“(π‘₯) β„Ž to determine the derivative of simple power functions and polynomial functions from first principles.

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Question 1

Use the definition \( f'(x) = \lim_{h \to 0} \frac{f(x+h) - f(x)}{h} \) to determine the derivative of \( f(x) = 2x^2 - 5x + 3 \) from first principles.

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Question 2

Use the first principles definition to determine $f'(2)$ for the function $f(x) = 3x^2 - 5$.

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Question 3

Use the definition of the derivative to determine $f'(2)$ for the function $f(x) = 3x^2 - 5x$.

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Use the rule 𝑑 𝑑π‘₯ π‘₯𝑛 = 𝑛π‘₯π‘›βˆ’1 for positive integers.
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