Question: Multiple choice question: ( provide an explanation for the chosen option) Let u and v be vectors in R 3 ( in the x-y-z plane)

Multiple choice question: ( provide an explanation for the chosen option)

Let u and v be vectors in R3 ( in the x-y-z plane) . Is u - projvuperpendicular to projvu ?

a) Only if either u-projvu or projvu is the zero vector.

b) Only if either u or v is the zero vector.

c) No. u - projvu is never perpendicular to projvu

d) yes, always

e) None of the above

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