Respostas

2013-04-15T08:49:58-03:00

Olá Edgomeste,

 

AP=PB

 

P-A=B-P

 

2P=B+A

 

P=\frac{B+A}{2}

 

Substituindo:

 

P=\frac{(4, 5, -2) + (2, -3, 1)}{2}

 

P=\frac{(6, 2, -1)}{2}

 

\boxed{P=(3,1,-\frac{1}{2})}

7 4 7