1.

If \[a,\ b,\ c\] are in A.P. and \[a,\ b,\ d\] in G.P., then \[a,\ a-b,\ d-c\] will be in  [Ranchi BIT 1968]

A. A.P.
B. G.P.
C. H.P.
D. None of these
Answer» C. H.P.


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