# Calculus 1 : How to find solutions to differential equations

## Example Questions

### Example Question #1332 : Functions

Find the equilibrium values for the following differential equation:

Explanation:

To find the equilibrium values, substitute  and solve for .  The equilibrium values are the solutions of the differential equation in constant form.

### Example Question #42 : Differential Equations

Suppose  is greater than zero. Solve the differential equation:

Explanation:

Rewrite  so that the same variables  are aligned correctly on the left and right of the equal sign.

Integrate both sides and solve for .

### Example Question #31 : How To Find Solutions To Differential Equations

Find the function whose slope at the point  is  and passes through the point .

Explanation:

This question requires us to use differential equations. Begin as follows:

Now, we know that y must pass through the point (4,5), so we can use this point to find c

So our function is as follows:

### Example Question #43 : Differential Equations

Solve:

Explanation:

Multiply and divide  on both sides of the equation .

Integrate both sides.

Use base to eliminate the natural log.

### Example Question #31 : How To Find Solutions To Differential Equations

.

Calculate

Explanation:

Remember that the derivative of .

.

Now plug in the  to find the corresponding values.

Substitute these into the desired formula.

### Example Question #32 : How To Find Solutions To Differential Equations

Determine the general solution to the following differential equation:

Explanation:

This is a separable differential equation, which means we can separate    and  ,  placing each on one side of the equation with its corresponding terms. There are no terms containing  ,  so we simply place    alone on one side of the equation and    on the other side of the equation with any    terms. We can then integrate each side with respect to the appropriate variable, which gives us an equation for    that is the general solution to the differential equation:

### Example Question #47 : Differential Equations

Consider the chemical reaction

Initially there are  moles of . The change in concentration of  occurs at the following rate.

Where .

Find  at  minutes.

Explanation:

Rearrange the equation to have all the   terms on one side and the rest of the terms on the other side.

From here we need to take the integral of the function.

Where C is some constant.

We know that the initial concentration of A is 10 mols. In otherwords, at

Solving for  gives

.

Plugging everything in gives

.

### Example Question #48 : Differential Equations

Find the particular solution for the following initial value problem:

Explanation:

To find the particular solution, we start by finding the general solution. First we rearrange the differential equation such that    is on one side with any    terms and    is on the other side with any    terms. We can then integrate each side with respect to the appropriate variable and solve for    to find the general solution for the differential equation. Finally, we plug in the given initial condition to determine the value of the constant, which gives us the particular solution:

### Example Question #49 : Differential Equations

Find the particular solution for the following differential equation:

Explanation:

To find the particular solution, we start by finding the general solution. First we rearrange the differential equation such that    is on one side with any    terms and    is on the other side with any    terms. We can then integrate each side with respect to the appropriate variable and solve for    to find the general solution for the differential equation. Finally, we plug in the    and    values of the given point to determine the value of the constant, which gives us the particular solution:

### Example Question #50 : Differential Equations

Determine the general solution to the following differential equation: