Question #299394

Determine the form of a particular solution for each differential equation. No need to solve for the general solution of the differential equation.


1. y'' − 3y' + 2y = xe^x + 1


1
Expert's answer
2022-02-22T23:19:05-0500

Corresponding homogeneous differential equation


y3y+2y=0y''-3y'+2y=0

Characteristic (auxiliary) equation


r23r+2=0r^2-3r+2=0

r1=1,r2=2r_1=1, r_2=2

Find a particular solution in form yp=x(Ax+B)ex+C.y_p=x(Ax+B)e^x+C.


yp=Ax2ex+Bxex+Cy_p=Ax^2e^x+Bxe^x+C


yp=Ax2ex+2Axex+Bxex+Bexy_p'=Ax^2e^x+2Axe^x+Bxe^x+Be^x


yp=Ax2ex+4Axex+2Aex+Bxex+2Bexy_p''=Ax^2e^x+4Axe^x+2Ae^x+Bxe^x+2Be^x

Ax2ex+4Axex+2Aex+Bxex+2BexAx^2e^x+4Axe^x+2Ae^x+Bxe^x+2Be^x

3Ax2ex6Axex3Bxex3Bex-3Ax^2e^x-6Axe^x-3Bxe^x-3Be^x

+2Ax2ex+2Bxex+2C=xex+1+2Ax^2e^x+2Bxe^x+2C=xe^x+1


2A=1-2A=1

2AB=02A-B=0

2C=12C=1

A=1/2,B=1,C=1/2A=-1/2, B=-1, C=1/2

The particular solution is


yp=12x2exxex+12y_p=-\dfrac{1}{2}x^2e^x-xe^x+\dfrac{1}{2}




Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be the first!
LATEST TUTORIALS
APPROVED BY CLIENTS