Question

1) determinar o décimo primeiro termo da P.A (2,5,8...).​

Answer 1

r = a₂ - a₁

r = 5 - 2

r = 3

an = a₁ + (n - 1) * r

a₁₀ = 2 + (10 - 1) * 3

a₁₀ = 2 + 9*3

a₁₀ = 2 + 27

a₁₀ = 29

Answer 2

$\mathsf{ a_n=a_1+(n-1)\cdot r}$

$\mathsf{a_{11}=2+(11-1)\cdot3 }$

$\mathsf{ a_{11}=2+10\cdot3}$

$\mathsf{a_{11}=2+30 }$

$\boxed{\boxed{\red{ \mathsf{ a_{11}=32}}}}$