Q. What is the particular solution to the differential equation dxdy=x+1(1−y)2 with the initial condition y(0)=5 ?
Separate variables: Separate the variables in the differential equation.We want to get all the y terms on one side and all the x terms on the other side. We can do this by multiplying both sides by dx and dividing both sides by (1−y)2.(1−y)2dy=x+1dx
Integrate sides: Integrate both sides of the equation.We need to integrate the left side with respect to y and the right side with respect to x.∫(1−y)2dy=∫x+1dx
Perform integration: Perform the integration.The integral of (1−y)21 with respect to y is 1−y1, and the integral of x+11 with respect to x is ln∣x+1∣. Don't forget to add the constant of integration C.1−y1=ln∣x+1∣+C
Apply initial condition: Apply the initial condition to find the constant C. We are given that y(0)=5, so we can plug in x=0 and y=5 into the equation to solve for C. 1−51=ln∣0+1∣+C−41=ln(1)+CC=−41
Substitute value of C: Substitute the value of C back into the equation.Now that we have found C, we can write the particular solution.1−y1=ln∣x+1∣−41
Solve for y: Solve for y in terms of x.To find y as a function of x, we need to solve the equation for y.1−y=ln∣x+1∣−411y=1−ln∣x+1∣−411
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