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If a ,ba n dc are in A.P., and pa n dp ...

If `a ,ba n dc` are in A.P., and `pa n dp '` are respectively, A.M. and G.M. between `aa n dbw h i l eq , q '` are , respectively, the A.M. and G.M. between `ba n dc ,` then `p^2+q^2=p^('2)+q^('2)` b. `p q=p ' q '` c. `p^2-q^2=p^('2)-q^('2)` d. none of these

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