alleryThe distance between the points $(1,2,3)$ and $(4,5,6)$ is:
A$9$
B$3$
C$\sqrt{27}\,/\,3$
D$3\sqrt3$
Answer & Solution
Correct answer: D. $3\sqrt3$
Distance = √[(4−1)²+(5−2)²+(6−3)²] = √(9+9+9) = √27 = 3√3.
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