The question is:
Which term in the expansion of ( [1/3x^2] - x )^15 is the constant term?
Sorry about not creating the equation properly.
Could anyone provide a moderately in-depth answer and how to approach the question?
In the 5th line that you wrote, where does the [(-1)^r][x^r] come from? (-x)^15 ??
If so, how?
Other than that I seem to understand it though! Thanks for making that!!!
*edit
NVM It seems there was a mistake but I know what happened now! Thanks for the solution. +rep