Summation

Definition.The definition of the summation process:

Summation is the addition of a set of numbers. The result is their sum.

Sums can be represented by the summation symbol, a capital Sigma. This is defined as:

Here, i is the index of summation; m is the lower bound of summation, and n is the upper bound of summation.

Most Commonly Useful Formulas:




		sum of combination of n things taken i at a time (see binomials )