Question

help me please..a capacitor of 4 micro farad is connected in series with a parallel combination of two capacitors of 6 micro farad each.The equivalent capacitance is ???

Answer 1

capacitors in parallel are simply added together, while capacitors in series you can find the equivalent capacitance like this
\[C_{eq}=(\frac{ 1}{ C_1 }+\frac{ 1 }{ C_2 })^{-1}\]