QCEVault

Vectors in three dimensions — Question 27

Original QCE Vault practice · 1 mark

Q27 · Practice questionSimple familiar1 mark

QUESTION 27

A unit vector in the direction of a=(2,−2,1)\mathbf a=(2,-2,1) is
(A)
(2,−2,1)(2,-2,1)
(B)
13(2,−2,1)\dfrac13(2,-2,1)
(C)
15(2,−2,1)\dfrac1{\sqrt5}(2,-2,1)
(D)
12(2,−2,1)\dfrac12(2,-2,1)
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