alexkim1088 alexkim1088

04-10-2018
Mathematics

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If y = 2x^3 + 4x and dx/dt = 2, find dy/dt when x = 4.

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sqdancefan sqdancefan

04-10-2018

dy/dx = 6x² +4 . . . . . using the power rule

dy/dt = (dy/dx)×(dx/dt) = (6(4²) +4)×2

dy/dt = 200 . . . at x=4

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