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Position vectors A and B be i + 2j -3k and 5i -3j respectively.Find a vector equation of the line m which passes thru the point A & B.? How to calculate rank of a matrix {{2x, 2y, 2z}, {2x, 2y,2z-2}}? Que producto se obtiene de ZnSO4∙7H2O + (CO (NH2)2)? Determine o cosseno do ângulo da reta (r): X=(2,0,1) + t (-1,-2,-2) com a reta definida pelos pontos A(4,0,-1) e B(-2,-3,1).? Please what time is my appointment on Tuesday 30/05/17. Thanks?