AM-2157

Stationary points

A Math · Secondary 4 · Medium · Stationary points

1. $\dfrac{6 + \sqrt{21}}{3}$ or $\dfrac{6 - \sqrt{21}}{3}$
2. $\dfrac{12 + \sqrt{21}}{3}$ or $\dfrac{12 - \sqrt{21}}{3}$
3. $\dfrac{6 + \sqrt{5}}{3}$ or $\dfrac{6 - \sqrt{5}}{3}$
4. $\dfrac{4 + \sqrt{21}}{3}$ or $\dfrac{4 - \sqrt{21}}{3}$

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