<PRE><B>Question 1210345</B>
.


To avoid misunderstanding, here is my correction to the post by Edwin, 
where he placed his solution for Geometric progression.



His last formula in his post should be


{{{S[10]}}} = {{{6*((3^10-1)/(3-1))}}} = {{{6*(59048/2)}}} = 6*29524 = 177144.



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As &amp;nbsp;I &amp;nbsp;see from the &amp;nbsp;Edwin&#39;s post &amp;nbsp;(as &amp;nbsp;@AnlytcPhil), &amp;nbsp;Edwin did not get the meaning of my correction.


The meaning is not in placing parentheses.


The meaning is that &amp;nbsp;I &amp;nbsp;changed &amp;nbsp;&#39; 10-1 &#39; &amp;nbsp;in the denominator by &amp;nbsp;&#39; 3-1 &#39;,
and then changed &amp;nbsp;&#39; 9 &#39; &amp;nbsp;in the denominator by &amp;nbsp;&#39; 2 &#39; &amp;nbsp;to make the numbers consistent.



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