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Find a ⋅ b. a = 4i - 4j, b = 4i + 5j -4 <8, 1> <16, -20> -36

Bethany Evans

in Mathematics

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Ronald Miller on August 21, 2018

A · b = a₁b₁ + a₂b₂ + ... = na · b = (4*4) + (-4*5) = 16 - 20 = -4


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