Using the Laplace transform and showing the details, find the current i(t) in the circuit in Fig. 130, assuming zero initial current and charge and 39. R2, L = 1 H, C = 0.5 F, v(t) = 1 kV if 0 2 R v(t) Fig. 130. Problems 38-40 Showing details, find f(t) if L(f) is equals: 40.5 2 s(s - 9) Using differentiation, integration, s-shifting, or convolution, and showing the details, find f(t), if L(f) equals: 2s +6 (s + 6s+ 10)