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[" If "(u" the ")/(a^(n-1)+b^(n-1))" is the A.M.between "a" and "b" ,then find the value of "n" ,"],[" Find the sum to "n" terms of each of the series in "1times2+2times3+3times4+4times5+....],[" Find equation of the line passing through the point "(2,2)" and cutting off intercepts on the "]

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