Last Modified: 2014-07-22
If ∑n=1∞an is
- Decreasing for all n in series
If ∫1∞ exists, then ∑n=1∞an converg.
and bn converges
- use for factorials
- if lim n->∞ |an+1/an|<1 series is absolutely convergent
- if lim n->∞ |an+1/an|>1 series is divergent
Horizontal traces are ellipses
Vertical traces are hyperbolas
Axis of symmetry corresponds to the variable whose coefficient is NEGATIVE
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