- #1
morbello
- 73
- 0
ive been asked to work out the coefficent of x^33 in the expansion of
(1/4 2x^3)^17
i know about (a+b) and ^C_ but I am unsure how to get k which is c_k
i worked off (1/4)^17-k (2x^3)^k
which give me 17*1/4 =4 1/4 and that is were i went wrong could you tell me a way to work out k
(1/4 2x^3)^17
i know about (a+b) and ^C_ but I am unsure how to get k which is c_k
i worked off (1/4)^17-k (2x^3)^k
which give me 17*1/4 =4 1/4 and that is were i went wrong could you tell me a way to work out k