Question

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n =〈−1,−2〉 and D=[−4 2]

[4 3].



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What is D ⋅ n?

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Answer 1

I get nD = <(-1)(-4)+(2)(4),(-1)(2)+(2)(3)> = <12,5>
Dn^{^T} = <8,2>^{^T}