AM-1722

Maxima and minima problems

A Math · Secondary 4 · Hard · Maxima and minima problems

1. $h = \dfrac{80 - \tfrac{4}{3}r^3}{r^2}$
2. $h = \dfrac{80 + \tfrac{2}{3}r^3}{r^2}$
3. $h = \dfrac{80 - \tfrac{4}{3}r^3}{r}$
4. $h = \dfrac{80}{r^2} - \dfrac{2}{3}r$

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