The equation Yk+1Yk – 2yk = -2 (6.38) can be transformed into the linear equation Xk+2 - 2xk+1+ 2xk = 0 (6.39) %3D by means of the substitution Yk = xk+1/xk. (6.40) The characteristic equation for equation (6.39) is p2 – 2r + 2 = 0, (6.41) and its two complex conjugate roots are r1,2 = 1+i = V2e±ir/4. (6.42) Therefore, the general solution of equation (6.39) is æk = 2*/2[D1 cos(Tk/4) + D2 sin(tk/4)], (6.43)
The equation Yk+1Yk – 2yk = -2 (6.38) can be transformed into the linear equation Xk+2 - 2xk+1+ 2xk = 0 (6.39) %3D by means of the substitution Yk = xk+1/xk. (6.40) The characteristic equation for equation (6.39) is p2 – 2r + 2 = 0, (6.41) and its two complex conjugate roots are r1,2 = 1+i = V2e±ir/4. (6.42) Therefore, the general solution of equation (6.39) is æk = 2*/2[D1 cos(Tk/4) + D2 sin(tk/4)], (6.43)
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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