Find the solution of this differential equation whose

painter555ui8n

painter555ui8n

Answered question

2022-04-06

Find the solution of this differential equation whose graph it is through the point (1, 3e).
Let y1(x)=ex and y2(x)=x2+1+ex be solutions of the differential equation
a(x)y+b(x)y=c(x)
where a, b, c are continuous functions on R and the function a has no zeros. Find the solution of this differential equation whose graph it is through the point (1,3e).
I know that difference between y1(x) and y2(x) is a solution of homogeneous differential equation. So solution of a homogeneous differential equation is
yh=A(x2+1)
I do not know how to get the particular solution. If I use variation constant for yp=z(x)(x2+1), where is z(x) a function, then I get
z=c(x)a(x)eb(x)a(x)dxdx

Answer & Explanation

Ouhamiptkg

Ouhamiptkg

Beginner2022-04-07Added 18 answers

Explanation:
The general solution to a first-order DE is given by y(x)=yh(x)+yp(x)=cg(x)+yp(x), where c is arbitrary and g is a solution to the associated homogeneous equation. Since you know two solutions y1 and y2, the difference must be proportional to g, which means that g(x)=x2+1 as you predicted. Moreover, this implies that the particular solution is yp(x)=ex. Thus, we have y(x)=c(x2+1)+ex and you can now solve for the constant c using the initial condition y(1)=3e.

Do you have a similar question?

Recalculate according to your conditions!

Ask your question.
Get an expert answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?