The words contained in this file might help you see if this file matches what you are looking for:
...Geometricprogression examples the following are called geometric progressions a ar wenote that ratio between any two consecutive terms of each above sequences is always same r ratios appear in common progression it usually denoted by rst term e g initial which letter example consider third sixth and twentieth given respectively pth arp geometricseries sum sn arn series multiplying then subtracting resulting gives s rs n so we obtain rn find seven sequence thus note clearly formula remark notice can be made arbitrary small choosing su ciently large exercises six eight ten p twelve...