Question

Calcular o 13° termo da p.a. (-2, 0, 2, 4)

CÁLCULO**

Answer 1

r = a₂ - a₁

r = 0 - (-2)

r = 0 + 2

r = 2

an = a₁ + (n - 1) * r

a₁₃ = - 2 + (13 - 1) * 2

a₁₃ = - 2 + (12) * 2

a₁₃ = - 2 + 24

a₁₃ = 22