# differential equations

• July 19th 2012, 04:14 PM
computers
differential equations
Use Laplace Transforms

Y”(t) + 4y(t) = f(t) with y(0) = 1, y’(0) = 1, where
f(t) = { 4t, 0 < t < 1
{ 4, t > 1
• July 19th 2012, 08:01 PM
$f(t)=4t[u(t)-u(t-1)]+4u(t-1)$