and p,q,r be in AP , then prove that x,y,z are in HP.
Last edited by CaptainBlack; Aug 31st 2009 at 08:39 PM.
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Originally Posted by matsci0000 and p,q,r be in AP , then prove that x,y,z are in HP. If , then , from which , , . But if p, q and r are in AP then so are , and .
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