Respostas

2014-04-28T16:05:32-03:00
Xm =  \frac{(Xa+Xb)}{2}

Xm =  \frac{(-1+5)}{2} = 2

Ym =  \frac{(Ya+Yb)}{2}

Ym =  \frac{(4+2)}{2} = 3

M = (2;3)
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