Question

write the coefficient of middle term in the expansion (1-y)50

Answer 1

1 and 50 is the coefficient

Answer 2

Answer:

50!/25!*25!

Step-by-step explanation:

The total number of terms =(n+1)=51

Since 50 is an even number,the middle term of (1-y)^50 will be

the (51+1/2)th term=26th term.

T26=T25+1

      =C(50,25)*y raised to  25

The coefficient=C(50,25)

                        =50!/25!*(50-25)!

                        =50!/25!*25!//