Practice – maths_waec_intro_to_calculus
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For a maximum point on a smooth curve, a common test is:
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dy/dx < 0 and d^2y/dx^2 = 0
dy/dx = 0 and d^2y/dx^2 < 0
dy/dx > 0 and d^2y/dx^2 > 0
dy/dx = 0 and d^2y/dx^2 > 0
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