Concept explainers
Use the result of Problem 33 to find the solution of the initial value problem
L[y]=(D−a)2y=g(t),
y(t0)=0, y'(t0)=0,
where a is any real number.
33. By choosing the lower limit of integration in Eq. (27) in the text as the initial point t0, show that Y(t) becomes
Y(t)=t∫t0y1(τ)y2(t)−y1(t)y2(τ)y1(τ)y2'(τ)−y1'(τ)y2(τ)g(τ)dτ
Show that Y(t) is a solution of the initial value problem
L[y]=g(t), y(t0)=0, y'(t0)=0
Thus Y can be identified with v in problem 32.
Y(t)=−y1(t)∫y2(t)g(t)W[y1, y2](t) dt+y2(t)∫y1(t)g(t)W[y1, y2](t) dt (27)

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