#Kreyszig Pg.107 Problem set 2.9 Question 6
var('x')
y=function('y',x)
print desolve(3*diff(y,x,2)+10*diff(y,x)+3*y==9*x+5*cos(x),[y,x])

SageDays/Kreyszig-2.9-6 (last edited 2010-08-11 11:41:01 by S Micheal Ammal)