Lista de exercícios do ensino médio para impressão
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Three points are given in the (x,y)-plane: $\;A=(1,2)\;$, $\;B=(2,-2)\;$ and $\;C=(4,3)\;$. The equation of the line passing through the point $\;A\;$ and the midpoint of the segment $\;\overline{BC}\;$ is:
a)
$3x + 4y = 11$
b)
$4x + \dfrac{7}{2}y = 11$
c)
$x + 3y = 7$
d)
$3x + 2y = 7$
e)
$x + 2y = 5$
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answer: (A)
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Determine the quadrants in which the points are located.
a)
$\,(\sqrt{2}\,;\;-\sqrt{3})\,$
b)
$\,(-\frac{1}{2}\,;\;\frac{\sqrt{2}}{2})\,$
c)
$\,(2\,-\,\sqrt{2}\,;\;1\,-\,\sqrt{2})\,$
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answer: a)4º b)2º c)4º
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