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04-06-2018
Mathematics

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If y = 4x3 + 4x and dx dt = 3, find dy dt when x = 2.

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04-06-2018

dy/dx = dy/dt / dx/dt

dy/dx = 12x^2 + 4

when x = 2 , dydx = 52

52 = dy/dt / 3

so dy/dt = 156 (answer)

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