Guan Ri Oh's answer to claire chen's Secondary 4 A Maths question.
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To prove if a stationary point is maximum or minimum, you have to find the 2nd order derivative (d^2L/dx^2).
Another of looking at it is that L represents distance and there has to be a minimum distance rather than a maximum distance. Not ideal for a proof but this intuition can guide you to the correct answer.
Another of looking at it is that L represents distance and there has to be a minimum distance rather than a maximum distance. Not ideal for a proof but this intuition can guide you to the correct answer.
Date Posted:
7 years ago
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