Ngày tải lên :
05/04/2014, 00:53
... A (1; 1; 1) , B(3; 3; 1) , C(3; 1; 3), D (1; 3; 3) b) A (1; 0; 2), B(2; 1; 1) , C(0; 2; 1) , D( 1; 3; 0) c) A(3; 2; 1) , B (1; –2; 1) , C(–2; 2; –2), D (1; 1; 1) d) A (1; 0; 11 ), B(0; 1; 10 ), C (1; 1; 8) , ... điểm: A (1; 1 ;1) , B( -1; 1; 0), C (3 ;1; -1) b) A(-3; 2; 4), B(0; 0; 7), C (-5; 3; 3) A(3; -1; 2), B (1; 2; -1) , C ( -1; 1; -3) d) A(0 ;13 ; 21) , B (11 ; -23 ;17 ), C (1; 0 ;19 ) A (1; 0; 2), B(-2 ;1; 1), C (1; -3; ... A(2; 5; -3), B (1; 0; 0), C (3; 0; -2), D (-3; -1; 2) b) A (1; 0; ) , B ( 0 ;1; ) , C ( 0; 0 ;1) , D ( -2 ;1; -1) c) A (1; 1; ) , B ( 0; 2 ;1) , C (1; 0; ) , D (1; 1 ;1) e) A(2; 3 ;1) , B(4 ;1; -2), C (6;...