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AB, CD and PQ are perpendiculars to BD. AB=x, CD=y and PQ=z. Prove that 1/x + 1/y = 1/z
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AB, CD and PQ are perpendiculars to BD. AB=x, CD=y and PQ=z. Prove that 1/x + 1/y = 1/z
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AB,CD,PQ are perpendicular to BD. AB=x,CD=y &PQ=z, then prove that 1/x+1/y=1/z
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