First slide

Arithmetic progression

Question

If $a_{1}, a_{2}, a_{3}, \dots$ are in A.P., then $a_{p}, a_{q}, a_{r}$ are in A.P. if p, q, r are in

Moderate

A

A.P.
B

G.P.
C

H.P.
D

none of these

Solution

If p, q, r are in A.P., then in an A.P. or G.P. or an H.P. a₁, a₂, a₃, ..., the terms opt a_p, a_q, a_r are in A.P., G.P. or H.P., respectively.

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