Question 1201c

Vectors I: Basics, Dot and Cross Products
Parallel Vectors

Question

Find a vector a{\mathbf{a}} that is parallel to
b=−2i−j+k\mathbf{b} = - 2 \mathbf{i} - \mathbf{j} + \mathbf{k}
such that a≠b.{\mathbf{a}\neq \mathbf{b}.}

Attempt

a={\mathbf{a}= }
({\Biggl(}
){\Biggr)}

Answer

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