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If a ,1/b ,c and1/p ,q ,1/r form two ar...

If `a ,1/b ,c` and`1/p ,q ,1/r` form two arithmetic progressions of the common difference, then `a ,q ,c` are in A.P. if `p ,b ,r` are in A.P. b. `1/p ,1/b ,1/r` are in A.P. c. `p ,b ,r` are in G.P. d. none of these

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