# Solution of Ex:2.3 Differential Equations with Boundary-Value Problems (7th Edition Book)

Solution of Ex:2.3 Differential Equations. Linear differential equations are a type of differential equation where the unknown function and its derivatives appear linearly. These equations are important in many areas of science and engineering, as they can model many physical phenomena. In solution of exercise 2.3 on page 60 of the seventh edition of “Differential Equations with Boundary-Value Problems” by Dennis G. Zill, several linear differential equations are solved. Let’s take a look at a few Solution of Ex:2.3 Differential Equations..

## Solved Examples for Understanding

Firstly, the first problem involves finding the solution to the differential equation y” + 4y = 0, subject to the initial conditions y(0) = 1 and y'(0) = 0. This is a second-order linear differential equation with constant coefficients, which can be solved using the characteristic equation. The characteristic equation is r^2 + 4 = 0, which has solutions r = +/- 2i. The general solution is then y(t) = c1 cos(2t) + c2 sin(2t). Using the initial conditions, we can solve for the constants c1 and c2 to get the specific solution y(t) = cos(2t).

Secondly, another problem involves finding the solution to the differential equation y” + y’ – 6y = 0. Again, this is a second-order linear differential equation with constant coefficients. The characteristic equation is r^2 + r – 6 = 0, which has solutions r = -3 and r = 2.

## Examples Demonstration

Finally, these examples demonstrate the power of solving linear differential equations. By using the characteristic equation and undetermined coefficients, we can find general solutions to a wide variety of problems. With further study and practice, anyone can become proficient at solving linear differential equations.