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categoryرياضيات
schoolبكالوريوس
event_available2026-07-15
السؤال
Transcribed Image Text:
Consider the following two-point boundary value problem (BVP)
y"(x)-x²y'(x)=(1+x)y(x) = 0, y(0) = 1, y(1)=2.
(1) Show that the problem (1) admits a unique solution.
(2) Describe the shooting method for solving the two-point BVP (1)
(1)
Divide the interval [0,1] uniformly into (n+1) sub-intervals each of length h and let
x = ih,i=0,1,...,n+1. Denote by yn the approximation of y(xn).
(3) Using the shooting method with n = 1 and invoking explicit Euler method for the
associated initial value problems with y'(0) = 0 and y'(0) = 1, respectively, compute
the approximate value of y(1/2).
(4) Describe the finite difference method for solving the BVP (1).
(5) Write explicitly the tridiagonal linear system Ay = b, where y = (y1,y2, - - - ‚ Yn),
obtained from the finite difference method.
(6) Give a sufficient condition on the step size h for which the above linear system
admits a unique solution.
(7) Show that the global error En = maxi=0,1,...ny(xn) - yn of the finite difference
method is in O(h²).
(8) Compute the approximate value of y(1/2) obtained from the finite difference method
with n = 2.
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