Question

How do you find the fourth term of `(2x+3y)^9`?

Answer 1

`217728x^6y^3`

Explanation:

Using binomial expansion, we know that the fourth term of `(2x+3y)^9 = (""^9"C"_4)(2x)^6(3y)^3=(216)(64x^6)(27y^3)=217728x^6y^3`