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20 April, 19:24

Y = square root of x, dx/dt = 12, find dy/dt when x = 9

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  1. 20 April, 21:57
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    dy/dt=2

    Step-by-step explanation:

    y=√x

    dy/dx=1 / (2√x)

    when x=9

    dy/dx=1 / (2√9) = 1 / (2*3) = 1/6

    dy/dx = (dy/dt) / (dx/dt)

    1/6 = (dy/dt) / 12

    dy/dt=1/6*12=2
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