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A.P. and G.P. formula

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by smehmood » Tue Aug 12, 2008 4:10 pm
I know GMAT doesn't ask for Arithmetic and Geometric progression formula. However, I noticed a number of GMAT questions are based on series and applying AP and GP formula may help in solving these questions. For eg: there was one question in GMATPrep (I posted a couple of days ago) asking for the sum of the 1st 10 numbers of a GP series.

Could you please let me know the formula to find the nth term and the sum of the 1st n numbers of an AP and GP series?
Thanks
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by sudhir3127 » Tue Aug 12, 2008 11:01 pm
Hope this will be useful,...
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by lukett » Fri Mar 30, 2012 5:17 pm
thank you sooooo much
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