Just wondering if anybody could help me identify the r value in the following geometric series (sorry it's in image form, I'm no good at tex):
Anyway, I had one similar just before where the coefficient was 1, meaning my a and r terms were both x - which made it easy - but this is for an extra little part on an assignment and I haven't done APs and GPs in about a year so I need a little refresh.
Thanks in advance.
Thank you good sir, though I feel silly for not seeing this earlier haha.
EDIT: Actually, I apologise; the initial value I had listed as x SHOULD have been 1.6x - that would've made it a whole lot simpler in terms of the a value. Silly mistake on my part, and thanks for the help; I guess that's what tripped me up.