How do you test a twice-differentiable function to determine where its graph is concave up or concave

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How do you test a twice-differentiable function to determine where its graph is concave up or concave down? Give examples.

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Thomas Calculus Early Transcendentals

ISBN: 9780321884077

13th Edition

Authors: Joel R Hass, Christopher E Heil, Maurice D Weir

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