Question

Verifique quais pontos abaixo per tecem à reta de equação 3x - 4y + 12 = 0.a) (0,3) b) (1,2) c) (2, 3/2) d) (1,1)

Answer 1

A reta r: 3x - 4y + 12 = 0

a) (0,3) → 3*0 - 4*3 + 12 = 0 ↔ -12 + 12 = 0 ↔ 0 = 0 → ∈ a r

b) (1,2) → 3*1- 4*2 +12 = 0 ↔ 3 - 8 + 12 = 0 ↔ 7 ≠ 12 → ∉ a r

c) (2,3/2) → 3*2 - 4(3/2) + 12 = 0 ↔ 6 - 6 + 12 = 0 ↔ 12 ≠ 0 → ∉ a r

d) (1,1) → 3*1 - 4*1 + 12 = 0 ↔ 11 ≠ 0 → ∉ a r

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07/04/2016
Sepauto - SSRC
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