Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If the constant term in the expansion of 
is 
, where 
is an odd integer, then the value of k is equal to :
Text Solution
Verified by ExpertsThe correct answer is:
D
General term
3r 1 + 2r 2 -5r 3 = 0 ...(1)
r 1 +r 2 +r 3 =10 ...(2)
from equation (1) and (2)
r 1 + 2(10-r 3 )-5r 3 = 0
r 1 +20=7r 3
(r 1 , r 2 , r 3 ) = (1, 6, 3)
constant term 
= 2 9 .3 2 .5 4 .7 1
= 9
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