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[" 20.If "A" and "G" be "A.M" ,and G.M.r...

[" 20.If "A" and "G" be "A.M" ,and G.M.respectively between two positive numbers,prove that the "],[" numbers are "A+-sqrt((A+G)(A-G))" ."],[" 21.Find the equation of set of points "P" such that "PA^(2)+DD^(2)" ,"x" ? "]

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If A and G be A.M.and GM.,respectively between two positive numbers,prove that the numbers are A+-sqrt((A+G)(A-G))

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If A and G be the A.M and G.M respectively between two positive numbers, prove that the numbers are A+-sqrt((A+G)(A-G)

If A and G be A.M. and GM., respectively between two positive numbers, prove that the numbers are A+-sqrt((A+G)(A-G)) .

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