Respostas

  • Usuário do Brainly
2014-07-15T17:36:53-03:00
{a₃ + a₅ = 32
{a₄ + a₆ = 64

{a₁ + 2r + a₁ + 4r = 32
{a₁ + 3r + a₁ + 5r = 64

{2a₁ + 6r = 32 . (- 1)
{2a₁ + 8r = 64

{- 2a₁ - 6r = - 32
{2a₁ + 8r = 64

2r = 32
r = 32/2
r = 16

2a₁ + 6r = 32
2a₁ + 6 . 16 = 32
2a₁ + 96 = 32
2a₁ = 32 - 96
2a₁ = - 64
a₁ = - 64/2
a₁ = - 32