Question

Find the Co-efficient of z ^4 in expansion of (5+z)^8

Answer 1

Answer:

43750

Step-by-step explanation:

Here,

r = 5 and n = 8.

So 5th term of (5 + z)8 =5 8 – 5 + 1. z5 – 1 .

Hence, coefficient of z4 is 43750.