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Find A· B
- a=5,8,b=3,1a = \langle 5 , - 8 \rangle , \quad b = \langle 3,1 \rangle

Question 245

Multiple Choice

Find a· b.
- a=5,8,b=3,1a = \langle 5 , - 8 \rangle , \quad b = \langle 3,1 \rangle


A) 8,7\langle 8 , - 7 \rangle
B) 7
C) 23
D) 15,8\langle 15 , - 8 \rangle

Correct Answer:

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