Question

calcule a distância do ponto (3,-1) à reta 4/3x-y-1=0

Answer 1

4/3 x - y - 1 = 0 => 4x - 3y - 3 = 0   e P(3, -1)

  $\frac{|ax + by + c|}{ \sqrt{ a^{2}+ b^{2}}} = \frac{|4.3-3.(-1)-3|}{ \sqrt{ 4^{2}+ (-3)^{2} } } = \frac{12}{5}$