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The magnitude of a given vector with end points (4, -4, 0) and (-2, -2, 0) must be

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a

6

b

52

c

4

d

210

answer is D.

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Detailed Solution

r→ = r2→−r1→= (−2i^−2j^+ok^) - (4i^−4j^+0k^)⇒ r→ = −6i^+2j^+0k^∴ |r→| = −62+(2)2+02= 36+4 =40 = 210

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