Question

If $\frac { a + b e ^ { y } } { a - b e ^ { y } }$ ==, then a, b, c, d are in –

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

Answer 1

Answer: (B)

G.P.

Answer 2

$\frac { a + b e ^ { y } } { a - b e ^ { y } }$ = =

applying, Componendo-dividendo,

̃ $\frac { \mathrm { b } } { \mathrm { a } }$ ==

̃ a, b, c, d are in G.P.