y"+16y = sec (4r) on the interval -7/8

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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In this problem you will solve the non homogeneous differential equation.

y"+16y=sec2(4x)

n-homogeneous differential equation
y"+16y sec"(4x)
on the interval -7/8< < T/8.
(1) Let C1 and C2 be arbitrary constants. The general solution of the related homogeneous differential equation y" + 16y=0 is
the function y, (x) = C y1(x) + C2 y2 (T) = C1
+C2
(2) The particular solution y, () to the differential equation y" + 16y = sec2(4x) is of the form
Yp(x) = Y1(x) u1(x) + Y2(x) u2(x)
where u (x) =
and u, (x) =
(3) It follows that
U1 (x) =
and u2(x) =
thus yp(x) =
(4) Therefore, on the interval (-1/8, 7/8), the most general solution of the non-homogeneous differential equation
y" + 16y = sec2(4x)
is y = C1
+C2
Transcribed Image Text:n-homogeneous differential equation y"+16y sec"(4x) on the interval -7/8< < T/8. (1) Let C1 and C2 be arbitrary constants. The general solution of the related homogeneous differential equation y" + 16y=0 is the function y, (x) = C y1(x) + C2 y2 (T) = C1 +C2 (2) The particular solution y, () to the differential equation y" + 16y = sec2(4x) is of the form Yp(x) = Y1(x) u1(x) + Y2(x) u2(x) where u (x) = and u, (x) = (3) It follows that U1 (x) = and u2(x) = thus yp(x) = (4) Therefore, on the interval (-1/8, 7/8), the most general solution of the non-homogeneous differential equation y" + 16y = sec2(4x) is y = C1 +C2
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