Right before t = 0 (at t = 0-): The circuit is presumed to have had the switch in position A for "a long time" and is in DC Steady State; the inductor is acting like a short circuit and the capacitor like a short circuit.
Right before t = 0 (at t = 0-):The circuit is presumed to have had the switch in positionA for "a long time" and is in DC Steady State; the inductoris acting like a short circuit and the capacitor like a shortcircuit.