Bertrand's Test
A Convergence Test also called de Morgan's and Bertrand's Test. If the ratioof terms of a Series 
can be written in the form
then the series converges if
and diverges if 
, where 
is the Lower Limit and
is the Upper Limit.See also Kummer's Test
References
Bromwich, T. J. I'a and MacRobert, T. M. An Introduction to the Theory of Infinite Series, 3rd ed. New York: Chelsea, p. 40, 1991.
- Functional Calculus
- Functional Derivative
- Function Field
- Function Space
- Functor
- Fundamental Class
- Fundamental Continuity Theorem
- Fundamental Discriminant
- Fundamental Forms
- Fundamental Group
- Fundamental Homology Class
- Fundamental Lemma of Calculus of Variations
- Fundamental System
- Fundamental Theorem of Algebra
- Fundamental Theorem of Arithmetic
- Fundamental Theorem of Curves
- Fundamental Theorem of Directly Similar Figures
- Fundamental Theorem of Gaussian Quadrature
- Fundamental Theorem of Genera
- Fundamental Theorem of Plane Curves
- Fundamental Theorem of Projective Geometry
- Fundamental Theorem of Space Curves
- Fundamental Theorem of Symmetric Functions
- Fundamental Theorems of Calculus
- Fundamental Unit