Many of the circuits for which we would like to find the natural response contain more than a single resistor and capacitor=> An equivalent circuit consisting of only one resistor and one capacitor R.R C T=RC=(r,+ R R 3 r,+ r (t)=voe R i1(0) R +r i1(t)=i1(0)e R,+ r1+rMany of the circuits for which we would like to find the natural response contain more than a single resistor and capacitor. => An equivalent circuit consisting of only one resistor and one capacitor.     t eq t V e C R R R R R C R V − = + = = + = 0 1 3 1 3 2 0 ( ) ( ) (0)  t i t i e − + ( ) = (0 ) 1 1 1 3 3 1 3 1 3 2 0 1 (0 ) R R R R R R R R V i +  + + = +