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Discrete Mathematics and Combinatorics by T. Sengadir

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Appendix A

Mathematical Preliminaries For Special Distributions

The Sigma Notation: The symbol Σ, known as sigma, is used to denote the summation of a sequence of numbers. If a1, a2, … is a sequence of numbers then, for example, the summation a4 + a5 + ⋯ + a11 is denoted by

 

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As further examples, we have

 

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Binomial Theorem: We have learnt the binomial theorem in Chapter 4, which states that for real numbers x, y and a positive integer n

 

 

The following formulae that are taught in high schools are also familiar to us:

Finite Geometric ...

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