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Pascal's Triangle is a triangular array where each number is the sum of the two numbers directly above it. It encodes binomial coefficients, combinatorics, and the coefficients of binomial expansions. Named after Blaise Pascal (1623–1662) though known much earlier.

Przewodnik krok po kroku

  1. 1Row 0: 1 | Row 1: 1, 1 | Row 2: 1, 2, 1 | Row 3: 1, 3, 3, 1
  2. 2Entry C(n,k) = entry in row n, position k = n! / (k!(n−k)!)
  3. 3Binomial expansion: (a+b)^n coefficients are row n of the triangle
  4. 4Sum of row n = 2^n; diagonal sums give Fibonacci numbers

Rozwiązane przykłady

Wejście
(x+y)^4
Wynik
1x⁴ + 4x³y + 6x²y² + 4xy³ + 1y⁴
Coefficients: Row 4 = 1,4,6,4,1
Wejście
Combinations C(5,2)
Wynik
10
Row 5, position 2 of Pascal's Triangle

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