# Charges set up in a tetrahedron

4 positive charges of magnitude $$Q$$ are kept on the corners of a regular tetrahedron, and a charge of magnitude $$q_o$$ is kept inside the tetrahedron such that system is in equilibrium. If the ratio $$\frac{Q^2}{q_o ^2}$$ can be expressed as $$\frac{a}{b}$$ then find the value of $$a+b$$.

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