brendaandeso4 brendaandeso4

25-03-2020
Mathematics

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for a sequence an=an-1+an-2 and a1=1, a2=2, find its first four terms

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kenlingdad kenlingdad

25-03-2020

Answer:

3, 5, 8, 13

Step-by-step explanation:

aₙ = aₙ₋₁ + aₙ₋₂

a₃ = a₂ + a₁ = 2 + 1 = 3

a₄ = a₃ + a₂ = 3 + 2 = 5

a₅ = a₄ + a₃ = 5 + 3 = 8

a₆ = a₅ + a₄ = 8 + 5 = 13

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