A-Level Maths: G1-20 Differentiation: Convex & Concave / Concave Up & Concave Down

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Concave = Looks like the opening to a cave

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That's how I remember it :)

alexshaw
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I think of Plato in his cave looking at a clock and being wise :)

TheExceptionalState
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to remember concave and convex can you not associate each one with clockwise and anticlockwise?

musejames