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RyanDude
Graph the unit step function f(t) = t - (t-1)u(t-1) - 2u(t-3)
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\[f(t)=\begin{cases}t&t<1\\t-(t-1)&1<t<3\\t-(t-1)-2&3<t\end{cases}\] \[\qquad=\begin{cases}t&t<1\\1&1<t<3\\-1&3<t\end{cases}\]