Question 93608
find the sum of the following infinite series. if a series doesn't have a sum, say "no sum"
the problem is 9 - 3 + 1 - 1/3 + 1/9 .........
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You have the sum of two geometric series:
1st series 9, 1/9, 1,81,....
2nd series -3, -1/3, -1/9,....
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Find the sum of each series using S(n)=a[(r^(n+1)-1)/(r-1)
or use what you know about infinite series if you are studying
calculus.
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When you have the sum of each series add them to get the sum
of the given series.
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Cheers,
Stan H.