Exercise 1.1.1

Question

Determine whether the vectors emanating from the origin and terminating at the following pairs of points are parallel.
\begin{enumerate}[label=(\alph*)]
\item $(3,1,2)$ and $(6,4,2)$
\item $(-3,1,7)$ and $(9,-3,-21)$
\item $(5,-6,7)$ and $(-5,6,-7)$
\item $(2,0,-5)$ and $(5,0,-2)$
\end{enumerate}

Jephian C.-H. Lin · Accepted Answer

\begin{enumerate}[label=(\alph*)]
\item No. $\frac{3}{6} \neq \frac{1}{4}$
\item Yes. $-3(-3,1,7)=(9,-3,-21)$
\item No.
\item No.
\end{enumerate}

kaliza sabine · Answer

(c)   yes.
this would imply -5=5k, 6= -6k, and -7=7k
SO k=-1
Since the k value are consistent, the vector are parallel

Exercise 1.1.1

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Exercise 1.1.1

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