Question

Let
a⃗ =5i+2j−3k
, then |a|= ……...
38

√38
4

√4

Answer 1

Answer on Question #56015 – Math – Vector Calculus

Let $\vec{a} = 5i + 2j - 3k$, then $|a| = \ldots$

Solution

$$|a| = |5i + 2j - 3k| = \sqrt{5^2 + 2^2 + (-3)^2} = \sqrt{25 + 4 + 9} = \sqrt{38}.$$

Answer: $\sqrt{38}$.

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