84. (Third problem ofCluster)(a) With the series pairC2andC3reduced to a singleC0=10µF capacitor, this becomes very similarto problem 82. Noting for later use thatq0=q2=q3, and using notation similar to that used inthe solution to problem 82, we haveQ=q1+q0whereQ=C1Vbat= 400µC. Also, after switch S is closed,V1=V0q1C1=q0C0which yields
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