Please help quick!!

Find the coefficient of http://webwork.tuhsd.k12.az.us/wwtmp...eba85ac7e1.png in the expansion of http://webwork.tuhsd.k12.az.us/wwtmp...a4af3bc701.png

Printable View

- January 29th 2013, 03:34 PMrikki397Expanding Binomials
Please help quick!!

Find the coefficient of http://webwork.tuhsd.k12.az.us/wwtmp...eba85ac7e1.png in the expansion of http://webwork.tuhsd.k12.az.us/wwtmp...a4af3bc701.png - January 29th 2013, 03:59 PMchiroRe: Expanding Binomials
Hey rikki397.

Hint: What given r satisfies for nCr (5x^2)^(n-r) * (-4/x)^r where (5x^2)^(n-r)*(-4/x)^r = a/x where a is a constant number?