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`A_k` lies on ellipse`A_k` lies on hyperbolaIf S be the focus of locus of `A_k` then `sum_(k=1)^(n)(A_k)S =na`If S be the focus of locus of `A_k` then `sum_(k=1)^(n) (A_(k) S)^2 = (n)/(2) (3a^2 - b^2)`

Answer :

A, C, and D