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Product rule ­ to be learnt! Chain rule: Quotient rule ­ to be learnt!
The chain rule is used to differentiate composite
If , then . functions (i.e. functions of a function).
It is used when there is a product of 2 functions. The chain rule operates by making…

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Connected rates of change: Example:
The word rate is associated with differentiation. The volume of a sphere is decreasing at a rate of
Key steps: We want .
20cm3/s. Find the rate at which the radius is
(1) Interpret mathematically the information given in the increasing when the radius is…




A really good presentation of Core 3 revision notes.

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