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Question

Find p and q such that : 2 p , 2 p + q , p + 4 q , 35 are in AP

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Solution

Wehave2p,2p+q,p+4q,35areinA.P2p+q2p=p+4q2pqq=3qpp=2q(1)Now,alsop+4q2pq=35p4q3qp=35p4q3q2q=352q41[Fromequation1]q=356q7q=35q=5and,p=2qp=10

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