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(Solved): Let a=2,4,5 and b=2,4,k. Find k so that a and b will be orthogonal. k= ...

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Let

a = ⟨ - 2, - 4, - 5 ⟩

and

b = ⟨ 2, - 4, k ⟩

. Find

k

so that

\overset{a}{ˉ}

and

\overset{ˉ}{b}

will be orthogonal.

k =

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Given,

If two vectors are orthogonal their dot product equals zero

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