Question: How many unit vectors are parallel to a given vector v 0? (a) 1, (b) 2, (c) 3, (d) , (e) Depends on the

How many unit vectors are parallel to a given vector v ≠ 0? 

(a) 1,

(b) 2,

(c) 3,
(d) ∞,

(e) Depends on the norm.

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