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[" Illustration "-26," If "a(1),a(2),a(3...

[" Illustration "-26," If "a_(1),a_(2),a_(3),.........,a_(n)," are in ""H.P.then "a_(1)a_(2)+a_(2)a_(3)+.........+a_(n-1)a_(n)=ka_(1)a_(n)" where "k" is: "," The "],[[" (A) "n-1," (B) ",n," (C) "1," (D) "," 1/n "]]

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