Problem with threee differential equations

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Melda Harlova 2019-12-28

关闭： John D'Errico 2019-12-28

Can someone help me with these three equatons. They have to solve with matlab code.

Here are :

y'' - y = 0

y(0)=0

y(1)=1

y''-y=-4(sin^3)x + 9sinx

y(0) = y(2*pi)

Ut=Uxx + U + 2sin2xsinx

U = U(x,t) where x is (0;pi/2) and t >0

Thnak you in advance!

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