Respostas

2014-01-24T16:43:21-02:00
A₁₀ = a₅ + 5r
62 = 8 +5r
5r = 56
r = 56/5 = 11,2

a₁ = a₅ -4r
a₁ = 8 - 4.56/5
a₁ = 8 - 224/5
a₁ = 8 - 44,8
a₁ = -36,8
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