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[" If "a,b,c" be respectively the "p^(" ...

[" If "a,b,c" be respectively the "p^(" th "),q^(" th ")" and "r^(" th ")" terms of a H.P.,then "Delta=|[bc,ca,ab],[p,q,r],[0,q,r],[1,1,1]|" equals "],[[" (A) "1," (B) "0," (C) "-1," (D) None of these "]]

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