BuyFindarrow_forward

Calculus: Early Transcendentals

8th Edition
James Stewart
ISBN: 9781285741550

Solutions

Chapter
Section
BuyFindarrow_forward

Calculus: Early Transcendentals

8th Edition
James Stewart
ISBN: 9781285741550
Textbook Problem

Solve the differential equation using the method of variation of parameters.

27. y 2 y + y = e x 1 + x 2

To determine

To solve: The differential equation by using method of variation of parameters.

Explanation

Given data:

The differential equation is,

y2y+y=ex1+x2 (1)

Consider the auxiliary equation.

r22r+1=0 (2)

Roots of equation (2) are,

r=(2)±(2)24(1)(1)2(1){r=b±b24ac2afortheequationofar2+br+c=0}=22=1

Write the expression for the complementary solution of the one real root.

yc(x)=c1erx+c2xerx (3)

Substitute 1 for r in equation (3),

yc(x)=c1e1x+c2xe1x

yc(x)=c1ex+c2xex (4)

From equation (4), set y1=ex and y2=xex .

Calculate y1y2y2y1 .

y1y2y2y1=exd(xex)dxxexd(ex)dx=ex(xex+ex(1))xexex=ex(x+1)exxexex=xexex+exexxexex

y1y2y2y1=exex=e2x

Write the expression to find the arbitrary function u1 ,

u1=G(x)y2y1y2y2y1

Here,

G(x) is the expression for R.H.S of differential equation in (1),

Substitute ex1+x2 for G(x) , xex for y2 , and e2x for y1y2y2y1 ,

u1=ex1+x2(xex)e2x=x1+x2

Integrate on both sides of the equation.

u1=x1+x2dxu1(x)=12ln(1+x2)

Write the expression to find the arbitrary function u2 ,

u2=G(x)y1y1y2y2y1

Here,

G(x) is the expression for R

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Chapter 17 Solutions

Show all chapter solutions add
Sect-17.1 P-11ESect-17.1 P-12ESect-17.1 P-13ESect-17.1 P-14ESect-17.1 P-15ESect-17.1 P-16ESect-17.1 P-17ESect-17.1 P-18ESect-17.1 P-19ESect-17.1 P-20ESect-17.1 P-21ESect-17.1 P-22ESect-17.1 P-23ESect-17.1 P-24ESect-17.1 P-25ESect-17.1 P-26ESect-17.1 P-27ESect-17.1 P-28ESect-17.1 P-29ESect-17.1 P-30ESect-17.1 P-31ESect-17.1 P-32ESect-17.1 P-33ESect-17.1 P-34ESect-17.2 P-1ESect-17.2 P-2ESect-17.2 P-3ESect-17.2 P-4ESect-17.2 P-5ESect-17.2 P-6ESect-17.2 P-7ESect-17.2 P-8ESect-17.2 P-9ESect-17.2 P-10ESect-17.2 P-11ESect-17.2 P-12ESect-17.2 P-13ESect-17.2 P-14ESect-17.2 P-15ESect-17.2 P-16ESect-17.2 P-17ESect-17.2 P-18ESect-17.2 P-19ESect-17.2 P-20ESect-17.2 P-21ESect-17.2 P-22ESect-17.2 P-23ESect-17.2 P-24ESect-17.2 P-25ESect-17.2 P-26ESect-17.2 P-27ESect-17.2 P-28ESect-17.3 P-1ESect-17.3 P-2ESect-17.3 P-3ESect-17.3 P-4ESect-17.3 P-5ESect-17.3 P-6ESect-17.3 P-7ESect-17.3 P-8ESect-17.3 P-9ESect-17.3 P-10ESect-17.3 P-11ESect-17.3 P-12ESect-17.3 P-13ESect-17.3 P-14ESect-17.3 P-15ESect-17.3 P-16ESect-17.3 P-17ESect-17.3 P-18ESect-17.4 P-1ESect-17.4 P-2ESect-17.4 P-3ESect-17.4 P-4ESect-17.4 P-5ESect-17.4 P-6ESect-17.4 P-7ESect-17.4 P-8ESect-17.4 P-9ESect-17.4 P-10ESect-17.4 P-11ESect-17.4 P-12ECh-17 P-1RCCCh-17 P-2RCCCh-17 P-3RCCCh-17 P-4RCCCh-17 P-5RCCCh-17 P-1RQCh-17 P-2RQCh-17 P-3RQCh-17 P-4RQCh-17 P-1RECh-17 P-2RECh-17 P-3RECh-17 P-4RECh-17 P-5RECh-17 P-6RECh-17 P-7RECh-17 P-8RECh-17 P-9RECh-17 P-10RECh-17 P-11RECh-17 P-12RECh-17 P-13RECh-17 P-14RECh-17 P-15RECh-17 P-16RECh-17 P-17RECh-17 P-18RECh-17 P-19RECh-17 P-20RECh-17 P-21RE

Additional Math Solutions

Find more solutions based on key concepts

Show solutions add

Conjugates Evaluate the given expression for z = 3 4i and w = 5 + 2i. 75. zz

Precalculus: Mathematics for Calculus (Standalone Book)

Evaluate the integral by making the given substitution. xex2dx,u=x2

Single Variable Calculus: Early Transcendentals, Volume I

In Exercises 51-58, use the Vertical Line Test to determine whether the graph represents y as a function of x. ...

Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach

If limx1f(x)8x1=10, find limx1f(x).

Single Variable Calculus

Find a definite integral for the consumer surplus if 180 units are available and the demand function is p(x) = ...

Study Guide for Stewart's Single Variable Calculus: Early Transcendentals, 8th

The harmonic series is: 1 + 2 + 3 + 4 + …

Study Guide for Stewart's Multivariable Calculus, 8th