Question

1)Obter o sexagésimo primeiro termo da P.A(2,5,8,...)

Answer 1

a₁ = 2

r = 5 - 2 ---- r = 3

an = a₁ + (n - 1) . r -------- a₆₁ = 2 + (61 - 1) . 3 ------ a₆₁ = 2 + (60) . 3

a₆₁ = 2 + 180 ------ a₆₁ = 182