1. The problem statement, all variables and given/known data Find v(t) for all t>0. Use second order method. 2. Relevant equations 3. The attempt at a solution Before the switch is closed: solving for i: -80+160i+80i+80i=0 i=0.25A KCL: From node v(t): [C dv(t)/dt] + i(t) + [V(t)/4] + [(v(t)-80i)/80]+[(v(t)-80)/160] = 0 KVL: v(t)=L di(t)/dt Later on solve the 1st equation for i(t), then substitute into KVL equation.