Question

Find the middle term(s) in the expansion of (2x-x²/4)⁹​

Answer 1

Step-by-step explanation:

Given expression (1−2x+x

2

)

n

⇒ (1−2x+x

2

)

n

=[(1−x)

2

]

n

=(1−x)

2n

Middle term (

2

2n

+1)

th

⇒(n+1)

th

term

T

n+1

=

2n

C

1

(1)

2n−n

(−x)

n

=

(n!)

2

2n!

(1)

n

(−x)

n

Middle term is

(n!)

2

(2n!)

(−1)

n

x

n

Answer 2

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