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ode2

Run Example
(%i1)eq:'diff(y,x,2)+9*y = 9/((cos (3*x))^2);
                              2
                             d y             9
(%o1)                        --- + 9 y = ---------
                               2            2
                             dx          cos (3 x)
(%i2) ode2(eq, y, x);
          sin(3 x) log(sin(3 x) + 1) - sin(3 x) log(sin(3 x) - 1) - 2
(%o2) y = -----------------------------------------------------------
                                       2
                                                  + %k1 sin(3 x) + %k2 cos(3 x)
(%i3) 
Run Example
eq: 'diff(m*x,x,2)+k*x;
                                 2
                                d
(%o1)                           --- (m x) + k x
                                  2
                                dx
(%i2) ode2(eq,x,x);
                                 2
                                d
(%t2)                           --- (m x) + k x
                                  2
                                dx

                                     msg1

(%o2)                                false
(%i3) 
Run Example
eq: 'diff(l,t) = k * (a - l);
                                dl
(%o1)                           -- = k (a - l)
                                dt
(%i2) eq2: ode2(eq,l,t);
                                - k t      k t
(%o2)                     l = %e      (a %e    + %c)
(%i3) sol: ic1(eq2, t= b, l= 0);
                              - k t      k t       b k
(%o3)                   l = %e      (a %e    - a %e   )
(%i4) 

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Help for Ode2