It is safe to assume that the switch drawn in the circuit of Fig. 8.58 has been closed suc...

It is safe to assume that the switch drawn in the circuit of Fig. 8.58 has been closed such a long time that any transients which might have arisen from first connecting the voltage source have disappeared, (a) Determine the circuit time constant, (b) Calculate the voltage υ(t) at t = τ, 2τ, and 5τ.