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Sanaa Garner
Mathematics
2 October, 11:29
Find a ⋅ b. a = 4i - 4j, b = 4i + 5j
-4
-36
+1
Answers (
1
)
Jayla Gillespie
2 October, 11:48
0
A · b = a₁b₁ + a₂b₂ + ... = n
a · b = (4*4) + (-4*5) = 16 - 20 = - 4
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