Respostas

2013-10-21T00:20:43-02:00
A) 2u-v=2.(2,-3) - (1,-1) = (4,-6) - (1,-1)=(3,-5)
b)v-u+2w=(1,-1) - (2,-3) + 2.(-2,-1) = (1,-1) - (2,-3) + (-4,-2) = (1-2-4, -1+3-2)=(-5,0)

4 4 4
letra a) esta certa mas a b) no gabario ta (-5,4). Para esse mesmo exercicio tem