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Assume thatxx and yy are both differentiable functions of tt and find the required values of dydt\frac{dy}{dt} and dxdt\frac{dx}{dt}.xy=6xy=6\newline(a) Find dydt\frac{dy}{dt}, given x=6x=6 anddxdt=13\frac{dx}{dt}=13.

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Q. Assume thatxx and yy are both differentiable functions of tt and find the required values of dydt\frac{dy}{dt} and dxdt\frac{dx}{dt}.xy=6xy=6\newline(a) Find dydt\frac{dy}{dt}, given x=6x=6 anddxdt=13\frac{dx}{dt}=13.
  1. Differentiate equation with respect to tt: Differentiate both sides of the equation xy=6xy=6 with respect to tt. Using the product rule for differentiation, we get d(xy)dt=d(6)dt\frac{d(xy)}{dt} = \frac{d(6)}{dt}. This simplifies to xdydt+ydxdt=0x\frac{dy}{dt} + y\frac{dx}{dt} = 0, since the derivative of a constant is 00.
  2. Substitute given values: Substitute the given values into the differentiated equation.\newlineWe know that x=6x=6 and dxdt=13\frac{dx}{dt}=13. So we substitute these values into the equation from Step 11 to get:\newline6dydt+y(13)=06\frac{dy}{dt} + y(13) = 0.
  3. Solve for dydt\frac{dy}{dt}: Solve for dydt\frac{dy}{dt}. We need to express yy in terms of xx using the original equation xy=6xy=6. Since x=6x=6, we have 6y=66y=6, which means y=1y=1. Now we substitute y=1y=1 into the equation from Step 22 to get: 6(dydt)+1(13)=06(\frac{dy}{dt}) + 1(13) = 0.
  4. Isolate dydt\frac{dy}{dt}: Isolate dydt\frac{dy}{dt}. To isolate dydt\frac{dy}{dt}, we subtract 1313 from both sides of the equation: 6(dydt)=136\left(\frac{dy}{dt}\right) = -13. Now, divide both sides by 66 to solve for dydt\frac{dy}{dt}: dydt=136\frac{dy}{dt} = -\frac{13}{6}.

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