[tex]\begin{aligned}\sf{\overrightarrow{PQ}}&=\sf{\overrightarrow{Q}-\overrightarrow{P}}\\&=\sf{\binom{3}{1}-\binom{7}{4}}\\&=\sf{\binom{-4}{-3}}\end{aligned}[/tex]
•› Panjang vektor PQ
[tex]\begin{aligned}\sf| \overrightarrow{PQ}|&=\sf{\sqrt{(-4)^2+(-3)^2}}\\&=\sf{\sqrt{16+9}}\\&=\sf{\sqrt{25}}\\&=\sf{5}\end{aligned}[/tex]
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[tex]\begin{aligned}\sf{\overrightarrow{PQ}}&=\sf{\overrightarrow{Q}-\overrightarrow{P}}\\&=\sf{\binom{3}{1}-\binom{7}{4}}\\&=\sf{\binom{-4}{-3}}\end{aligned}[/tex]
•› Panjang vektor PQ
[tex]\begin{aligned}\sf| \overrightarrow{PQ}|&=\sf{\sqrt{(-4)^2+(-3)^2}}\\&=\sf{\sqrt{16+9}}\\&=\sf{\sqrt{25}}\\&=\sf{5}\end{aligned}[/tex]