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Posted by on Monday, November 19, 2012 at 10:38pm.

xy=-2 and dy/dt=4. Find dx/dt when x=1.

  • math - , Monday, November 19, 2012 at 11:06pm

    xy = -2

    x dy/dt + y dx/dt = 0
    using the given:
    when x = 1, y = -2

    1(4) + (-2)(dx/dt) = 0
    dx/dt = -4/-2 = 2

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