#Kreyszig Pg.107 Problem set 2.9 Question 12
var('x')
y=function('y',x)
print desolve(diff(y,x,2)+3*diff(y,x)-18*y==9*sinh(3*x),[y,x])

SageDays/Kreyszig-2.9-12 (last edited 2010-08-11 11:46:56 by S Micheal Ammal)