Exam-style question
Try this first
Given u = [2, 3] and v = [4, 1], what is the dot product u · v?.
- A.11
- B.10
- C.14
- D.5
Model answer
What a good answer should say
- 11
Explanation
Why this works
Multiply corresponding entries and add the results: u · v = (2 × 4) + (3 × 1) = 8 + 3 = 11.
Common mistake
No common mistake is linked to this question yet.