Consider the function f(x) =x²/5x+6​ If ∑ₙ₌₀[infinity]=cₙ​xⁿ is a power series representation of f(x) , then for n≥2, ​cₙ​​=
a. (-1) ⁿ/5ⁿ
b. (-1) ⁿ/6ⁿ
c. 1/5ⁿ
d. 1/6ⁿ