Question

Find the 5th term of (m + 2)^9

Answer 1

=2016x5

Explanation:

(x+y)n=∞∑r=0~nCrxn−ryr is given by

Tr+1=~nCrxn−ryr.

Hence T5=T4+1=~9C4x9−4⋅24

=9!(9−4)!4!⋅x5⋅16

=2016x5