First slide

Geometric progression

Question

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

Moderate

A

A.P
B

G.P
C

H.P
D

A.G.P

Solution

Apply compendo and dividendo
$\begin{array}{l} \frac{2 a}{2 b e^{y}} = \frac{2 b}{2 c e^{y}} \\ = \frac{2 c}{2 d e^{y}} \frac{a}{b} = \frac{b}{c} = \frac{c}{d} \end{array}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App