1. The problem statement, all variables and given/known data Capacitors C1 and C2 are connected in series and this combination is connected in parallel with capacitor C3. 2. Relevant equations Q=CV Ceq=C1+C2+C3 equivalent capacitance for capacitors in parallel 1/Ceq=1/C1+1/C2+1/C3 equivalent capacitance for capacitors in series 3. The attempt at a solution The question says that C1 and C2 are connected in series, so I would use the second equation, so I would have 1/C=1/C1+1/C2, but then I don't know how I would add that to C3.