Question

12. Find u · v for u = 3i + 4j and v = i - 2j

a.
$\sqrt{5}$

b. -5
c. 10
d. 3i - 8j​

Answer 1

ANSWER: -3-2ji-8j^2

EXPLAINATION:

I dont know why that isn’t one of the answers but that’s what I got. You could try D.

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