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Using implicit differentiation, find 
(dy)/(dx).

sqrt(xy)=-4+xy^(3)

Using implicit differentiation, find dydx \frac{d y}{d x} .\newlinexy=4+xy3 \sqrt{x y}=-4+x y^{3}

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Q. Using implicit differentiation, find dydx \frac{d y}{d x} .\newlinexy=4+xy3 \sqrt{x y}=-4+x y^{3}
  1. Apply Chain and Product Rule: First, we need to differentiate both sides of the equation with respect to xx. The equation is xy=4+xy3\sqrt{xy} = -4 + xy^3. We will apply the chain rule and product rule where necessary.
  2. Differentiate Left Side: Differentiate the left side with respect to xx. The left side is xy\sqrt{xy}, which is (xy)12(xy)^{\frac{1}{2}}. Using the chain rule and product rule, we get 12(xy)12×(xdydx+y)\frac{1}{2}(xy)^{-\frac{1}{2}} \times (x\frac{dy}{dx} + y).
  3. Differentiate Right Side: Differentiate the right side with respect to xx. The right side is 4+xy3-4 + xy^3. The derivative of 4-4 is 00, and using the product rule for xy3xy^3, we get y3+3xy2dydxy^3 + 3xy^2\frac{dy}{dx}.
  4. Equate Derivatives: Now we equate the derivatives from both sides: (12)(xy)12(xdydx+y)=0+y3+3xy2dydx(\frac{1}{2})(xy)^{-\frac{1}{2}} * (x\frac{dy}{dx} + y) = 0 + y^3 + 3xy^2\frac{dy}{dx}.
  5. Simplify Equation: Simplify the equation by multiplying both sides by 2(xy)1/22(xy)^{1/2} to get rid of the fraction and the square root: xdydx+y=2(xy)1/2(y3+3xy2dydx)x\frac{dy}{dx} + y = 2(xy)^{1/2}(y^3 + 3xy^2\frac{dy}{dx}).
  6. Expand Right Side: Expand the right side of the equation: xdydx+y=2y3(xy)12+6x2y2dydxx\frac{dy}{dx} + y = 2y^3(xy)^{\frac{1}{2}} + 6x^2y^2\frac{dy}{dx}.
  7. Group Terms: Group the terms with dydx\frac{dy}{dx} on one side and the rest on the other side: xdydx6x2y2dydx=2y3xyyx\frac{dy}{dx} - 6x^2y^2\frac{dy}{dx} = 2y^3\sqrt{xy} - y.
  8. Factor Out: Factor out (dydx)(\frac{dy}{dx}) on the left side: (dydx)(x6x2y2)=2y3(xy)12y(\frac{dy}{dx})(x - 6x^2y^2) = 2y^3(xy)^{\frac{1}{2}} - y.
  9. Solve for dydx\frac{dy}{dx}: Solve for dydx\frac{dy}{dx} by dividing both sides by (x6x2y2)(x - 6x^2y^2): dydx=2y3(xy)12yx6x2y2\frac{dy}{dx} = \frac{2y^3(xy)^{\frac{1}{2}} - y}{x - 6x^2y^2}.
  10. Final Simplification: Simplify the expression for dydx\frac{dy}{dx} if possible. However, in this case, the expression is already in its simplest form.

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