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Solve the differential equation (dy)/(dx)=(3)/(xy^(2))

Solve the differential equation dydx=3xy2 \frac{d y}{d x}=\frac{3}{x y^{2}}

Full solution

Q. Solve the differential equation dydx=3xy2 \frac{d y}{d x}=\frac{3}{x y^{2}}
  1. Separate Variables: We are given the differential equation dydx=3xy2\frac{dy}{dx}=\frac{3}{xy^{2}}. To integrate this with respect to xx, we need to separate the variables yy and xx.
  2. Rewrite Equation: Rewrite the equation to separate the variables:\newlinedydx=3xy2\frac{dy}{dx} = \frac{3}{xy^{2}}\newlineMultiply both sides by dx and divide by y2y^{2} to get:\newlinedyy2=3xdx\frac{dy}{y^{2}} = \frac{3}{x} dx
  3. Integrate Separately: Now, integrate both sides of the equation with respect to their respective variables:\newline(dyy2)=(3x)dx\int(\frac{dy}{y^2}) = \int(\frac{3}{x}) dx
  4. Apply Integrals: The integral of 1y2\frac{1}{y^2} with respect to yy is 1y-\frac{1}{y}, and the integral of 3x\frac{3}{x} with respect to xx is 3lnx3\ln|x|. So we have:\newline1y=3lnx+C-\frac{1}{y} = 3\ln|x| + C, where CC is the constant of integration.
  5. Final Solution: We have successfully separated the variables and integrated both sides. The solution to the differential equation is: 1y=3lnx+C-\frac{1}{y} = 3\ln|x| + C

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