1.

If the plane passes through three collinear points ((x_1,y_1,z_1),(x_2,y_2,z_2),(x_3,y_3,z_3) ) then which of the following is true?

A. (x_1 y_1 z_1+x_2 y_2 z_2+x_3 y_3 z_3 )=0
B. ( begin{vmatrix}x_1&y_1&z_1 x_2&y_2&z_2 x_3&y_3&z_3 end{vmatrix} )=0
C. ( begin{vmatrix}x_1 y_2 z_3 end{vmatrix} )=0
D. (x_1 x_2 x_3+y_1 y_2 y_3+z_1 z_2 z_3=0 )
Answer» C. ( begin{vmatrix}x_1 y_2 z_3 end{vmatrix} )=0


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