Question

Write the first four terms in the expansion of: (x + y)^8

Answer 1

Given:

`(x+y)^8`

We will write the first four terms of the expansion.

the general rule of the expansion is as follows:

`(x+y)^n=x^n+n*x^(n-1)*y+...+nCr*x^(n-r)*y^r+...+y^n`

So, the answer will be, the first four terms are:

`x^8+8x^7y+28x^6y^2+56x^5y^3`