Comments

• 17. what's the sum of the geometric sequence -a million, 6, -36, ... if there are 7 phrases? first-term, a = -a million, person-friendly-ratio, r = 6/(-a million) = -6, S7 = a(r^7-a million) / (r-a million) = -a million[(-6)^7 -a million] / (-6-a mi…

  in Sequences and Series problem? Comment by gaeta June 2021
• 17. what's the sum of the geometric sequence -a million, 6, -36, ... if there are 7 phrases? first-term, a = -a million, person-friendly-ratio, r = 6/(-a million) = -6, S7 = a(r^7-a million) / (r-a million) = -a million[(-6)^7 -a million] / (-6-a mi…

  in Sequences and Series problem? Comment by gaeta May 2021