Question

The coefficient of x9
in the expansion of (1 + x)(1 + x2
)( 1 + x3
)……….(1 + x
100) is

Answer 1

Answer:

What is the coefficient of x^9 in (1+x)(1+x^2)(1+x^3) … (1+x^100)? Therefore the coefficient of x9 is 8.