Recall that a function is homogeneous if:. Differentiating the substitution, using the product rule to differentiate the right-hand side, gives:. A cancellation such as this will always happen and the remaining equation should be solvable by a simple method such as separation or an integrating factor. The above equation is solvable by separation.

### Homogeneous Functions

The equation can now be separated and integrated directly using standard integrals :. To do this, differentiate the given substitution:. The chain rule is used to differentiate the right-hand side:. Explanation : To find the general solution to the given system first find the eigenvalues and eigenvectors. Report an Error.

Example Question 1 : Homogeneous Linear Systems. Explanation : To solve the homogeneous system, we will need a fundamental matrix.

## Homogeneous Differential Equation: Functions, Videos, Solved Examples

Explanation : So this is a homogenous, second order differential equation. Solve the second order differential equation: Subject to the initial values:.

Solve the differential equation for y: Subject to the initial condition:. Explanation : So this is a homogenous, first order differential equation. Solve the third order differential equation:. Explanation : So this is a homogenous, third order differential equation. Solve the differential equation: Subject to the initial conditions:.

Explanation : A saddle point phase plane results from two real eigenvalues of different signs.

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Example Question 71 : Differential Equations. Find the general solution to the system of ordinary differential equations where. Copyright Notice.

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Copyright holder you represent if other than yourself. An example of such a homogeneous equation is:. The different types of homogeneous equation are entirely separate entities, and it is important not to confuse the two. Note that the product rule has been used to differentiate the right-hand side. This can be expressed more compactly using prime notation :.

## Homogeneous linear substitutions

First note that the question has not specified that the equation is to be solved by substitution. Here it is advisable to spend a few moments thinking about the most appropriate method for solving the equation. In this case the equation cannot be separated, so it cannot be solved by separating and then integrating directly.