Question

Qual é o 15° termo da P.A (2,5,8,...)?​

Answer 1

An = ?

a₁ = 2

n = 15

r = a₂ - a₁

r = 5 - 2

r = 3

An = a₁ + (n - 1) * r

A₁₅ = 2 + (15 - 1) * 3

A₁₅ = 2 + 14*3

A₁₅ = 2 + 42

A₁₅ = 44

Answer 2

an=a1+(n-1)×r

a15=2+(15-1)×3

a15=2+14×3

a15=2+42

a15=44