Hi, Need help with this circuit. I am task to find out the resonance frequency of this circuit. R=30 ohms L=20mH C1=2uF C2=3uF If it is just R,L and C1 and I easily calculate the resonance frequency by applying the formula f=1/2âˆâˆšLC Now I have another capacitance C2 parallel to this original RLC1, how do I calculate the resonance? How does this C2 affect the resonance? Any help is appreciated. Thanks.