Derivatives (1 Viewer)

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Can someone explain to me iii) and iv) ? Thanks bros

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AlarmBell

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For part (iii):



Note: In the first line, it is negative 6 because A_3 is under the x axis.

With this, part (iv) should be easily graphed since you know the values of the important points and the derivatives at those points (using the given graph).
 
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