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Fibonacci spiral: squares and quarter-circle arcs (like the nautilus)
Fibonacci in Pascal's triangle: shallow diagonals sum to Fibonacci numbers
Binet's formula: closed-form for Fibonacci
F(n) = (φⁿ − ψⁿ) / √5
φ = (1+√5)/2 ≈ 1.61803… ψ = (1−√5)/2 ≈ −0.61803…
Because |ψ| < 1, ψⁿ → 0. F(n) is the nearest integer to φⁿ / √5.
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Question
Berapa jumlah n bilangan Fibonacci pertama?
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