A good answer might be:

(-2, 5, -6)T  ·  ( 1, 2, 3)T   =   (-2)*1 + 5*2 + (-6)*3   =   -2 + 10 -18   =   -10


Any Real is Possible

The answer is a negative real. This is fine. Dot products produce all kinds of reals: negative, zero, positive. However, something interesting happens when you take the dot product of a vector with itself.

QUESTION 15:

What is:

(1, -3)T  · (1, -3)T  =  ?