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January 26, 2015

January 26, 2015

Posted by **What's the Difference?** on Tuesday, April 24, 2012 at 5:39pm.

How do I tell the difference?

- Convergent/Divergent -
**bobpursley**, Tuesday, April 24, 2012 at 5:46pmdo the ratio test:

ratio (An+1)/An=

the series is SUM (1/n)^5 for n=1>inf

ratio [(1/n+1)/ (1/n)]^5=(n/(n+1))^5 which is less than 1, so the series converges. This means, if you add all the terms, the sum will be a finite q

- Convergent/Divergent -
**bobpursley**, Tuesday, April 24, 2012 at 5:46pmdo the ratio test:

ratio (An+1)/An=

the series is SUM (1/n)^5 for n=1>inf

ratio [(1/n+1)/ (1/n)]^5=(n/(n+1))^5 which is less than 1, so the series converges. This means, if you add all the terms, the sum will be a finite quanity. If the ratio had been 1 or greater, the series would have been divergent.

http://abacus.bates.edu/acad/acad_support/msw/convergence_tests.pdf

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