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Discrete Algebra |
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![]() Sigma-Notations ![]() Arithmetic Progressions ![]() Geometric Progressions ![]() Binomial Theorem ![]() Pascal's Triangle
![]() 1 + 2 + ... + n ![]() 1² + 2² + ... + n² ![]() 1³ + 2³ + ... + n³
![]() Basic Conceptions ![]() Constituents of the Induction Principle ![]() Model Examples Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 |
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A sum of indexed numbers is usually written by making use of the ∑notation:
Any letter can be used as the index of summation:
The following simple formulas are useful in algebraic transformations of the expression:
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