The coefficient of t4 the expansion of 
is
isQuestion ID - 56742 | SaraNextGen Top Answer The coefficient of t4 the expansion of is
The coefficient of t4 the expansion of is
1 Answer
127 votes
Answer Key / Explanation : (15) -
(1−t6)3(1−t) −3
(1−t18−3t6+3t12)(1−t)−3 is
cofficient of t4 in (1−t) −3 is
3+4−1C4=6C2=15
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