## Summation tutorial

This tutorial is made especially for those of you who forget or confuse with the mathematics symbol Sigma that represent summation. Learning this simple tutorial may give you benefit to be able to read many books and information that you usually avoid because of that notation.

Click on the following topics

What is the meaning ofSigmaSymbol? (definition of sum)

Whydo we need to put a sigma symbol?

Sometimes I see the sigma symbol withno index, what is the meaning?

Please tell me about summation Tricks (Summation Properties)

Can I change thatHow do wedummy index? (Change of index)

I confuse aboutdouble summation! (Interchange order of double summation)

Can Iexpand or regroup the sum? (Addition or subtraction of Sum)

Can wemultiply two sums? (Distributive law for product)

Can Iseparate the Sum? (Domain Separation)

Can Iput out only the last term?

How do Imultiply a sum with a constant? (Constant Multiplication)

What isTelescoping Sum?

Is there any trick on theSum of constants?code Sumin a program?

Tell me more aboutUseful summations(definite sums)

Resources on Summation

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See also: Mean and Average, Difference Equation , Pictorial Introduction to Graph Theory

**Preferable reference for this tutorial is**

Teknomo, Kardi. Summation Tutorial. http://people.revoledu.com/kardi/tutorial/BasicMath/Sum/