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what is the format of article writing?
essay on mobile phone:laabh aur haani
format of diary entry
The ratio of the sum of n terms of two A.P.s is (7n+1):(4n+27).Find the ratio of their mth term.
if tano+sino = m,tano -sino =n,prove that m2 -n2=4root mn
summary of the last lesson
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