Question

Me ajudem pfvrrreeee

Answer 1

Resposta:

4) A=(1,1); B=(0,-2)

$\frac{|d|}{2} =0\\\left[\begin{array}{ccc}1&1&1\\0&-2&1\\x&y&1\end{array}\right] =0\\\\-2+x+0-(-2x)-y-0=0\\3x-y-2=0$
$y=3x-2$

5) A=(2,-4); m=-1/3
$y=mx+n\\y=\frac{-x}{3} +n$
inserindo as coordenadas x=2 e y=-4
$-4=\frac{-2}{3} +n\\-4=\frac{-2+3n}{3} \\-12=-2+3n\\3n=-10\\n=\frac{-10}{3}$

$y=\frac{-x}{3} +\frac{-10}{3}$

*Equações no formato de equação reduzida da reta