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The Fibonacci sequence is defined by a₁ = a₂ = 1 and aₙ = a_{n−1} + a_{n−2}. Its first five terms are
A1, 2, 3, 4, 5
B0, 1, 1, 2, 3
C1, 1, 3, 4, 7
D1, 1, 2, 3, 5
Answer & Solution
Correct answer: D. 1, 1, 2, 3, 5
a₃ = 1 + 1 = 2; a₄ = 1 + 2 = 3; a₅ = 2 + 3 = 5. Hence 1, 1, 2, 3, 5.
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