Which of the following are meaningless A vector A which is t

Which of the following are meaningless? A vector A which is the cross product of i and 3. A vector A = (A_x, A_y, A_z), for which Ay = j. A vector A for which A = i middot (j x k) A vector A for which A = i middot j A vector A for which A = i x (j x k) A vector A for which A = i/j A vector A for which A = i/3 The dot product of two vectors B and C is perpendicular to -k A cross product of two vectors B and C has magnitude 11.0 A cross product of two vectors B and D lies in the xz plane.

Solution

The following are meaningless,

A vector A for which A=i/j

A vector A for which A=i/3

The dot product of two vectors B and C is perpendicular to -k.