Concepts2
∑MathAdvanced
Generating Functions - OGF
An ordinary generating function (OGF) encodes a sequence (a_n) as a formal power series A(x) = \sum_{n \ge 0} a_n x^n.
#ordinary generating function#ogf#coefficient extraction+12
∑MathIntermediate
Binomial Theorem and Identities
The binomial theorem expands (x + y)^n into a sum of terms using binomial coefficients that count how many ways to choose k items from n.
#binomial theorem#binomial coefficient#pascal's triangle+12