User:RedDragonAkai~enwikibooks/sandbox

Impulse Function

dolorum ipsut latin latin greeky talksisum vini vidi vici salve semper ubi sub ubi et salve discipuli et discipulae

\int _{-\infty} ^{t} u(s) \, ds = \left\{ \begin{array}{l l} 0, & \quad \mbox{if $t<0$}\\ \int _0 ^t \, ds & \quad \mbox{if $t \geq 0$}\\ \end{array} \right\} = t u(t)math>