Question

f (

2 +

1

)

11

be equal to the coefficient of

−7

in the

expansion of ( −

1



2

)

11

,prove that = 1​

Answer 1

f (2 +1)11be equal to the coefficient of −7in the expansion of ( −12)11l,prove that = 1

If the coefficient of

in

is equal to the coefficient of

in

then