Question

Please help I have ten minutes left!

What is the coefficient of the last term in the binomial expansion of (x+1)^9?

A) 0
B) 1
C) 9
D) 10

Answer 1

B. 1

Explanation:

This is because a coefficient not because there is a 1 in the equation but because a coefficient is the number before a variable

Examples:

4x-8 4 is the coefficient

5+8x 8 is the coefficient

My teacher always said there is an invisible 1 before each variable

So basically (1x+1)^9 is your equation but the one is hidden.

I hope this helps!