Question

What is the fourth term in the expansion of (x + 2y)^8?

a. 336x^5y^3
b. 448x^5y^3
c. 1120x^4y^4
d. 1680x^4y^4

Answer 1

Base on my calculation and the simplification of the form and finding its 4th power of the x+2y, i came up with a solution and finally found an answer of B. 448x^5y^3, I hope i answer your questions directly and please feel free to ask for more and ask for clarifications