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# Lecture - 8 Chapter 13 Limits and Derivatives

All four cases of Direct Derivative Derivation of rule for direct derivative of algebra function using first principle

Addition and Subtraction

\( [f(x) \pm g(x)]’ = f'(x) \pm g'(x)\)

Multiplication (Product Rule)

\( [f(x) \times g(x)]’ = f(x) \times g'(x) + g(x) \times f(x) \)

Division (Quotient Rule)

\( \left [ \frac{f(x)}{g(x)} \right ]^’ = \frac{g(x) f'(x) – f(x) g'(x)}{g^2(x)}\)

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