Originally Posted by

**pnklv** Thanks 4 check, life saver since the triple integral on my exam near dragged my points down below 12/20

Srry if this seems a stupid question, but what is ODE ( i assume a program/applet to calc DE's) & where can I find it ? ( might come in handy later

)

ODE means Ordinary differential equation.

What I ment is you cant take derivatives of your solution and plug them into the ode and check your solution. This is exactly like solving

and plugging into it to check your solution.

IF you look at the attached immage above this code

Code:

diff(y,x$2)-2*diff(y,x)-3*y

means

and it did give the correct solution.