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Key ideas
Key ideas
Examining rates of change close to turning points helps to identify intervals where the function increases/decreases, and identify the concavity of the function.
I can explain the difference between increasing and decreasing intervals and their relationship with the gradient of the tangent to a curve
Sign Diagrams
Sign Diagrams
Sign diagrams are used to find out on what intervals functions are positive and negative. This is important to know when working with derivative functions.
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