If three numbers a, b and c are in A.P., then b+c, c+a and a+b are in
H.P.
G.P.
A.P.
None of these
Given a, b and c are in A.P.
b - a = c - b
(c+a) - (b+c) = (a+b) - (c+a)
So, they are in A.P.
If a, b, c are in A.P. then 3a, 3b, 3c are in ___.
If sin (B + C − A), sin (C + A − B), sin (A + B − C) are in A.P., then cot A, cot B and cot C are in (a) GP (b) HP (c) AP (d) None of these
If a,b,c are in A.P., then abc,1c,2b are in