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Question: If a, b, c are in G.P. then <img src="https://cdn.pureessence.tech/canvas_9.png?top_left_x=1028&top_...

If a, b, c are in G.P. then equals

A

1c2−b2\frac { 1 } { c ^ { 2 } - b ^ { 2 } }

B
C
D
Answer
Explanation

Solution

1a2−b2+1 b2=1a2[11−r2+1r2]\frac { 1 } { \mathrm { a } ^ { 2 } - \mathrm { b } ^ { 2 } } + \frac { 1 } { \mathrm {~b} ^ { 2 } } = \frac { 1 } { \mathrm { a } ^ { 2 } } \left[ \frac { 1 } { 1 - \mathrm { r } ^ { 2 } } + \frac { 1 } { \mathrm { r } ^ { 2 } } \right]

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