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CGP EDU Academic Team
Published on: August 14, 2026
Find the coefficient of x r in the expansion of (x +3) n-1 + (x + 3) n-2 (x + 2) + (x + 3) n-3 (x+2) 2 ---- + (x + 2) n–1
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Sol. Given series is a. G.P.
Sum = 
⇒ 
coeff. of x r is = 
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