Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If the coefficients of 
terms of 
are in A.P., then r =
Text Solution
Verified by ExpertsThe correct answer is:
D
; 
By the given condition 
…..(i)
⇒ ⇒ 
⇒ ⇒ 
= 
+ 
⇒ ⇒ 
⇒ ⇒ 
⇒ ⇒ 
⇒ ⇒ 
⇒ ⇒ 
⇒ ⇒ 
⇒ ⇒ 
But 5 is not given. Hence r = 9.
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