Re: HSC 2013 4U Marathon
The only geometric series I can think of are:
(e^{2ix})^1 + (e^{2ix})^2 + \cdots + (e^{2ix})^n
and (cis2x)+(cis2x)^2+...+(cis2x)^n
By the way, do we have to memorise the sums to products formulas? I have seen many questions that require them but I think they give the...