Q6 of 136 Page 29

Find in vector form as well as in Cartesian form, the equation of the line passing through the points A(1, 2, –1) and B(2, 1, 1).

the vector of point A can be written as and that of point B can be written as

vector equation of line AB is given by



Here and


⇒



Here x = 1 +


⇒


Hence the cartesian equation of the line is



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