Question

a $\left( \frac { 1 } { b } + \frac { 1 } { c } \right)$, b , c are in A.P. then-

• A. , ,are in A.P.
• B. a, b, c are in H.P.
• C. , , are in G.P.
• D. a, b, c are in A.P.

Answer 1

Answer: (D)

a, b, c are in A.P.

Answer 2

,, $\frac { c ( a + b ) } { a b }$ are in A.P.

(b – a) (cb + ca + ab) =(c – b). (ac + ab + cb)

(b – a) = (c – b) ; so a, b, c are in A.P.