Solve the differential equation, such that the equation

John Henry

John Henry

Answered question

2022-07-24

Solve the differential equation, such that the equation passes through the given point (x, y). (Remember to use absolute values where appropriate.)

 

dy/dx=x-6/x,      (-1,8)

Answer & Explanation

Nick Camelot

Nick Camelot

Skilled2023-06-10Added 164 answers

To solve the given differential equation dydx=x6x, and find the particular solution that passes through the point (1,8), we can use separation of variables and integrate both sides.
Separating the variables, we have:
dyx6=dxx.
Now, let's integrate both sides:
dyx6=dxx.
Integrating the left side with respect to y and the right side with respect to x, we get:
ln|x6|=ln|x|+C,
where C is the constant of integration.
Next, we can simplify the equation using logarithmic properties. Taking the exponential of both sides, we have:
|x6|=|x|eC.
Since eC is a positive constant, we can rewrite the equation as:
x6=kx or x6=kx,
where k=eC.
Solving these two cases separately:
Case 1: x6=kx,
x(1k)=6,
x=61k.
Case 2: x6=kx,
x(1+k)=6,
x=61+k.
Now, let's substitute the given point (1,8) into the equations and find the corresponding values of k:
For Case 1:
1=61k,
1k=6,
k=7.
For Case 2:
1=61+k,
1+k=6,
k=7.
Therefore, we have two possible solutions:
1. When k=7, the solution is x=617=1.
2. When k=7, the solution is x=61+(7)=68=34.
Hence, the particular solutions of the given differential equation passing through the point (1,8) are x=1 and x=34.

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