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Answer:

Will |v| = (v • v) ever be negative?     No, since length is always zero or positive.

Will it ever be zero?     Yes, when v is the zero vector.


Properties of Dot Product

Another property of the dot product is:

(au + bv) w = (au) w + (bv) w, where a and b are scalars

Here is the list of properties of the dot product:

  1. u • v = |u||v| cos θ
  2. u • v = v • u
  3. u • v = 0 when u and v are orthogonal.
  4. 0 • 0 = 0
  5. |v|2 = v • v
  6. a (u•v) = (a u) v
  7. (au + bv) w = (au) w + (bv) w

QUESTION 8:

(Trick Question: ) What is u • v • w ?


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