The capacitor shown in the figure has been charged to a potential difference of
V volts, so that it carries a charge
CV with both the switches
S1 and
S2 remaining open. Switch
S1 is closed at
t=0. At
t=R1C, switch
S1 is opened and
S2 is closed. The charge on the capacitor at
t=2R1C+R2C is
CE(1−1en)+CVe(n+1). Then the value of n is