Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The coefficient of x 5 in the expansion of (1 + x 2 ) 5 (1 + x) 4 is -
Text Solution
Verified by ExpertsThe correct answer is:
B
( 5 C 0 + 5 C 1 x 2 + 5 C 2 x 4 + 5 C 3 x 6 + ...... ) ×
(1 + 4 C 1 x + 4 C 2 x 2 + 4 C 3 x 3 + 4 C 4 x 4 )
Now, coefficient of x 5
= 5 C 1 × 4 C 3 + 5 C 2 × 4 C 1
= 20 + 40 = 60
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