ConceptArithmetic Progression

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#### Question

If p^{th} , q^{th} and r^{th} terms of an A.P. are a, b, c respectively, then show that

(i) a (q – r) + b(r – p) + c(p – q) = 0

(ii) (a – b) r + (b –¬ c) p + (c – a) q = 0

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