Find the coefficient of a^5b^4 in (3a-b/3)^9 (question 2 a. ii on the picture)
need it asap!

378

Step-by-step explanation:

ii. We use the binomial theorem which states that,

I'll explain in depth if you want me to.

We have

We must find the coeffeicent that include term.

The first term of the binomial expansion is a which has a degree 9 and b has a degree of 0. and since the term, a has a^5 and b^4. here this must that 9 must choose 4.

So let do the combinations formula,

So during that point our expansion will include.

So the coeffeicent is 378

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}