Recent content by DarkLord777

Hmmm and if I don't have mathematica? I tried wolfram alpha but it can't solve it with all 4 boundary conditions. If I only use 2 I end up with a massive equation (18+ terms) that I still have to solve for 2 constants. I tried solving it by hand from scratch and get the wrong answer. (well...

surely the particular solution must satisfy the boundary conditions?

Hi guys, I am trying to find the exact solution of: u'''' + 5u =f on (0,1) f is a constant >0 where u(0)=u'(0) =0 u''(1) =k constant >0 u'''(1)=0 I assumed I should look at solving the homogeneous equation and got the following uh = A*exp(Zx)*sin(Zx) + B*exp(ZX)*cos(Zx) +...