I am having problems on this "said to be easy" olimpiad problem.(adsbygoogle = window.adsbygoogle || []).push({});

If anyone can give me some hints, I'd be greatful!

(unfortunately I could not get the subscripts to work, that is why everything that is superscribed should be lowered)

u[tex]_{tt}[/tex] = a(x)*u[tex]_{xx}[/tex]. x[tex]\in R[/tex]

a(x) = 1 (if x>0)

a(x) = 2 (if x<=0)

u|[tex]_{t=0}[/tex] = b(x) u[tex]_{t}[/tex]|[tex]_{t = 0}[/tex] = 0

b(x)= 0 when x[tex]\notin[/tex] [0, 1]

b(x) = 2x-2 when x[tex]\in [1, 1.5][/tex]

b(x) = -2x+4 when x[tex]\in[1.5, 2][/tex]

The problem is to draw the graph of the function u(t, x) when t = 5.

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# Olimpiad problem

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