Question 1143485
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It is just solved at this link


<A HREF=https://www.algebra.com/algebra/homework/Sequences-and-series/Sequences-and-series.faq.question.1143488.html>https://www.algebra.com/algebra/homework/Sequences-and-series/Sequences-and-series.faq.question.1143488.html</A>


https://www.algebra.com/algebra/homework/Sequences-and-series/Sequences-and-series.faq.question.1143488.html



By the way, pay attention on how Edwin edited your post, using PARENTHESES.


Do it EVERY time (use parentheses), when you post formulas to the forum,


to clearly show, which part of the formula is a numerator and which part is a denominator.



Otherwise, your formulas are UNREADABLE and AMBIGUOUS.