Question

Dados os pontos A(-1,3,2) , B (1,0,1) C ( 2,-1,3) determinar D tal que DC = 2BA

Answer 1

DC = C – D = (2-x ; -1-y ; 3-z)
BA = A – B = (-2 ; 3 ; 1)
2BA = (-4 ; 6 ; 2)
{ 2-x = -4 → x= 6
{ -1-y = 6 → y= -7
{ 3-z = 2 → z= 1

D(6,-7,1)