Question

Determina o decimo termo de p.a ((5,8,11,13)

Answer 1

a1 = 5
r = 8-5 = 3

an = a1 + (n-1)r
a10 = 5 + (10-1)3
a10 = 5 + 9.3
a10 = 5 + 27
a10 = 32

Answer 2

r = a₂ - a₁
r = 8 -5
r = 3

$A_{n} = a_{1} + (n -1) . r$
a₁₀ = 5 + 9 . 3
a₁₀ = 5 + 27
a₁₀ = 32