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Proof of the Chain Rule

The Chain Rule is used to differentiate a function of a function. It states, If a functionis the composite of two simpler functionsandsothen

We can prove the Chain Rule from first principles using the difference quotient.

The Chain Rule is probably the hardest of the three differentiation rules to understand. It is often hard to identify the elementary functions.

Ifthenand

Ifthenand

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