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Combinatorics

Learn the notion of a factorial and a combinatorial number, as well as the principle of addition and multiplication, i.e. combinatorial concepts focused on solving counting problems such as variations, permutations and combinations.

• Combinations with repetition
• Combinations without repetition
• Combinatorial numbers
• Equations with factorial numbers and combinatorial numbers
• Factorial and combinatorial numbers
• Identity of symmetry
• Newton's binomial and Pascal's triangle
• Permutations with repetition
• Permutations without repetition
• Simplification in expressions with factorials
• Stifel formula
• The factorial of a number
• The principle of addition and multplication
• Variations with repetition
• Variations without repetition