In each of Problems 1 through 4, determine the order and the degree of the given differential equation; also state whether the eauation is linear or nonlinear. 1. t++2y = sint 2. (1+ y*)++y = et 3. +++y=1 4. dt + sintt + y) = sın t

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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A. In each of Problems 1 through 4, determine the order and the degree of the given A. In each of Problems 1 through 8, solve the given equations using separable differenti A. In each of Problems 1 through 10, solve the given equations using exact differential
differential equation; also state whether the eauation is linear or nonlinear.
equations.
equations.
1. "= 3xt
1. (6x + y)dx + v(2x-3v)dv = 0
1. t2 +t + 2y = sint
dt
2. (y? – 2xy + 6x)dx – (x² – 2xv + 2)dv = 0, when x = 1, v = 2
%3D
2. (1+ y?) +t+ y = et
2. x
dx
3. v(2uv? - 3)du + (3u?v? – 3u + 4v)dv = 0, whe
nu = 1, v = 1
3 dy+y+ + 2+ y = 1
dt
dy
3. 2= T
4. (1+ y? + xy²)dx + (x²y +y + 2xy)dy = 0
dt
dt
dx
4.
dt
5. (w + wz? - z)dw + (z + w²z – w)dz = 0, when w = 4,z = 2
4.
de
+ sin(t + y) = sin t
xef+
B. In each of Problems 5 through 9, verify that each given function is a solution of the
differential equation.
dy
5.
dr 14
sect
,when x = 0,y = 0
6. (cos x cos y - cot x)dx - (sin x sin y)dy = 0
%3D
7. x(3xy – 4y + 6)dx + (x - 6x*y - 1)dy = 0, when x = 2, y = 0
5. y" - y = 0; y(t) = et
de 1-4v
6. х
u
F.when x = 3, y = 2
%3D
3p
8. 2xydx + (y2 + x?)dy = 0
6. y" + 2y' - 3y = 0; y(t) = e-3t
7. = 8x'e"2y, when x = 1,y = 0
%3D
7. ty' - y = t?; y = 3t +t?
9. (xy? +y - x)dx + x(xy + 1)dy = 0, when x = 1, y = 1
8. Jydx + (1+x)dy = 0,, when x = 1, y = 4
10. (1- xy)-?dx + [y? + x?(1 - xy)-]dy = 0. when x = 3, y = 4
8. y"" + 4y" +3y = t; y(t) =
B. In each of Problems 9 through 15, solve the given equations using homogeneous differential
equations.
9. (xy + y)dx - x'dy = 0, when x = 2, y = 1
9. t'y" + Sty' + 4y = 0; y(t) =t-2
C. In each of Problems 10 through 11, determine the values of r for which the given
differential equation has solutions of the form y= e".
10. y" +y' - 6y = 0
10. (3x - y?)dx + (xy - x'y-1)dy = 0,, when x = 0, y = 2
11. (y? – xy)dx + x²dy = 0,when x = 3,y = 3
11. y" - 3y" + 2y' = 0
12.=
12, atvt
D. In each of Problems 12 through 15, eliminate the arbitrary constant using the methoc
you're comfortable with.
12. y = 3Ax + 2Bx? + 4Cx – D
tx
13. 2txdx + (t2 - x)dt = 0
13. x*y +x*y* = C
14. --y
dr
3xy
14. y = -2C, e-3x + Cze
15. (t +x + 2)dx + (3t - x - 6)dt = 0, when x = 1, y = 1
15. y = C,e-3x - 2C;e-
Transcribed Image Text:A. In each of Problems 1 through 4, determine the order and the degree of the given A. In each of Problems 1 through 8, solve the given equations using separable differenti A. In each of Problems 1 through 10, solve the given equations using exact differential differential equation; also state whether the eauation is linear or nonlinear. equations. equations. 1. "= 3xt 1. (6x + y)dx + v(2x-3v)dv = 0 1. t2 +t + 2y = sint dt 2. (y? – 2xy + 6x)dx – (x² – 2xv + 2)dv = 0, when x = 1, v = 2 %3D 2. (1+ y?) +t+ y = et 2. x dx 3. v(2uv? - 3)du + (3u?v? – 3u + 4v)dv = 0, whe nu = 1, v = 1 3 dy+y+ + 2+ y = 1 dt dy 3. 2= T 4. (1+ y? + xy²)dx + (x²y +y + 2xy)dy = 0 dt dt dx 4. dt 5. (w + wz? - z)dw + (z + w²z – w)dz = 0, when w = 4,z = 2 4. de + sin(t + y) = sin t xef+ B. In each of Problems 5 through 9, verify that each given function is a solution of the differential equation. dy 5. dr 14 sect ,when x = 0,y = 0 6. (cos x cos y - cot x)dx - (sin x sin y)dy = 0 %3D 7. x(3xy – 4y + 6)dx + (x - 6x*y - 1)dy = 0, when x = 2, y = 0 5. y" - y = 0; y(t) = et de 1-4v 6. х u F.when x = 3, y = 2 %3D 3p 8. 2xydx + (y2 + x?)dy = 0 6. y" + 2y' - 3y = 0; y(t) = e-3t 7. = 8x'e"2y, when x = 1,y = 0 %3D 7. ty' - y = t?; y = 3t +t? 9. (xy? +y - x)dx + x(xy + 1)dy = 0, when x = 1, y = 1 8. Jydx + (1+x)dy = 0,, when x = 1, y = 4 10. (1- xy)-?dx + [y? + x?(1 - xy)-]dy = 0. when x = 3, y = 4 8. y"" + 4y" +3y = t; y(t) = B. In each of Problems 9 through 15, solve the given equations using homogeneous differential equations. 9. (xy + y)dx - x'dy = 0, when x = 2, y = 1 9. t'y" + Sty' + 4y = 0; y(t) =t-2 C. In each of Problems 10 through 11, determine the values of r for which the given differential equation has solutions of the form y= e". 10. y" +y' - 6y = 0 10. (3x - y?)dx + (xy - x'y-1)dy = 0,, when x = 0, y = 2 11. (y? – xy)dx + x²dy = 0,when x = 3,y = 3 11. y" - 3y" + 2y' = 0 12.= 12, atvt D. In each of Problems 12 through 15, eliminate the arbitrary constant using the methoc you're comfortable with. 12. y = 3Ax + 2Bx? + 4Cx – D tx 13. 2txdx + (t2 - x)dt = 0 13. x*y +x*y* = C 14. --y dr 3xy 14. y = -2C, e-3x + Cze 15. (t +x + 2)dx + (3t - x - 6)dt = 0, when x = 1, y = 1 15. y = C,e-3x - 2C;e-
A. In each of Problems 1 through 10, solve the given equations using linear differential
A. In each of Problems I through 3. verifv that each given function is a solution of the differential equation.
equations.
1. y' = x – 2y
1. Verify y =x* is a solution to the differential equation = xyi.
2. Verify y = 4 cos(2x) + 6 sin(2x) is a solution to y" = -4y.
2. (y + 1)dx + (4x – y)dy = 0, when x = 4, y = 4
3. Is y = e* + 2xe-* a solution to y" + 2y' +y = 0.
B. In each of Problems 4 and 5, eliminate the arbitrary constant using the method you're comfortable with
3. ydx + (1 – 3y)xdy = 3ydy,when x = 3,y = 2
4. y= Ae-3x + Bex
5. y = Cearcsan x
4. y' = x – 4y, when x = 2,y = 3
C. In cach of Problems 6 through 15, determine what type of differential equation of order one the
following equations is and solve the given equations using the tvpe of differential equation you had
given
5. y' = csc x + y cot x
6. (xy +y -x)dx +x(xy + 11dv = 0. when x = 2. v = 2
7. (16x + 5y)dx + (3x + y)dy = 0. when x = 1. v = -3
6. y' = x – 2y cot 2x
8. 2ydx = (x - 1)(dx – dy)
9. xy*dx + e*dy = 0
7. (y- x + xy cot x)dx + xdy = 0
10. (2xy – tan y)dx + (x - xsec?y)dy = 0
8. y' = 1+ 3y tan x
11. (y? + 7xy + 16x?)dx + x*dy = 0, when x = 1. v = 1
12. y' = cos'x cosy
9. 2y(y2 – x)dy = dx, when x = 2,y = 2
13. x(x? + 1)y' + 2y = (x + 1)3, when x = 1. y = 1
14. (cos 2y – 3x2y2)dx + (cos 2y – 2x sin 2y – 2x'y)dy = 0
10. y' = x³ - 2xy, when x = 1, y = 1
15. (3x - 2y)y' = 2xy, when x = 0, y = -1
Transcribed Image Text:A. In each of Problems 1 through 10, solve the given equations using linear differential A. In each of Problems I through 3. verifv that each given function is a solution of the differential equation. equations. 1. y' = x – 2y 1. Verify y =x* is a solution to the differential equation = xyi. 2. Verify y = 4 cos(2x) + 6 sin(2x) is a solution to y" = -4y. 2. (y + 1)dx + (4x – y)dy = 0, when x = 4, y = 4 3. Is y = e* + 2xe-* a solution to y" + 2y' +y = 0. B. In each of Problems 4 and 5, eliminate the arbitrary constant using the method you're comfortable with 3. ydx + (1 – 3y)xdy = 3ydy,when x = 3,y = 2 4. y= Ae-3x + Bex 5. y = Cearcsan x 4. y' = x – 4y, when x = 2,y = 3 C. In cach of Problems 6 through 15, determine what type of differential equation of order one the following equations is and solve the given equations using the tvpe of differential equation you had given 5. y' = csc x + y cot x 6. (xy +y -x)dx +x(xy + 11dv = 0. when x = 2. v = 2 7. (16x + 5y)dx + (3x + y)dy = 0. when x = 1. v = -3 6. y' = x – 2y cot 2x 8. 2ydx = (x - 1)(dx – dy) 9. xy*dx + e*dy = 0 7. (y- x + xy cot x)dx + xdy = 0 10. (2xy – tan y)dx + (x - xsec?y)dy = 0 8. y' = 1+ 3y tan x 11. (y? + 7xy + 16x?)dx + x*dy = 0, when x = 1. v = 1 12. y' = cos'x cosy 9. 2y(y2 – x)dy = dx, when x = 2,y = 2 13. x(x? + 1)y' + 2y = (x + 1)3, when x = 1. y = 1 14. (cos 2y – 3x2y2)dx + (cos 2y – 2x sin 2y – 2x'y)dy = 0 10. y' = x³ - 2xy, when x = 1, y = 1 15. (3x - 2y)y' = 2xy, when x = 0, y = -1
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