Question

If a₁, a₂, a₃ ……a_n are in H.P. & f(k)=– a_k then

, , ,…….., are in

• A. A.P.
• B. G.P.
• C. H.P.
• D. None of these

Answer 1

Answer: (C)

H.P.

Answer 2

f(k) + a_k == N (say)

\ f(k) = N – a_k Ž= –1

\ , ……. $\frac { \mathrm { f } ( \mathrm { n } ) } { \mathrm { a } _ { \mathrm { n } } }$ are in A.P.

So , ….., are in H.P.