Mathematica 9 is now available
Student Support Forum
Student Support Forum > General > > "some trouble with DSolve"

Post Reply:
Email Address:

Please send email when my message is replied to.

Url (optional):
Message: view original message?
Attachment (optional):
Please answer this:6+2 =

Original Message (ID '461688') By Bill Simpson:
You say D[n[x, t], {x,1}]==k/a*n[x,t] thus I believe D[n[x, t], {x,2}]==(k/a)^2*n[x,t] thus I believe your problem becomes In[1]:= eqns = {D[n[x, t], {t,1}] - 1/Np - a*(k/a)^2*n[x, t]==0}; DSolve[eqns, n[x, t], {x, t}] Out[2]= {{n[x, t] -> -(a/(k^2*Np)) + E^((k^2*t)/a)*C[1][x]}} Please check this very carefully to make certain I have not made any mistakes. Then you can try to get Mathematica to do it without manual intervention or insight.