EXERCISES 4.4
Answers to selected odd-numbered problems begin on page ANS-5.
In Problems 1-26 solve the given differential equation by undeter-mined coefficients.
1. y” + 3y’ + 2y — 6
2. 4y- + 9y — IS
3. y” — lOy’ -I- 25y = 30x + 3
4. y” + – 6y = 2x
5. + y’ + y — x” — 2x
6. y” + 20y — 100r2 26rex
7. y” + 3y = —48x7e3.
8. 4y” — 4y’ — 3y — cos 2x
9. y” — y’ = —3
10.y”+2y’=2x+5 —e
11.1′ y’+Iy— 3 +ex/2
12. y” 16y — 2e4.
13. y” + 4y — 3 sin 2r
14. y” — 4y = (x7 — 3) sin 2x
15. y”+y= 2x sin x
16. y” — Sy’ — 2×1 — 4x’ — x + 6
17. y” 2y’ + 5y — e. cos 2x
