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Let a=⟨5,−1,−2}\mathbf { a } = \langle 5 , - 1 , - 2 \}

Question 145

Essay

Let a=⟨5,−1,−2}\mathbf { a } = \langle 5 , - 1 , - 2 \} and b={1,−4,3}\mathbf { b } = \{ 1 , - 4,3 \} .(a) Compute a+2ba + 2 b .(b) Find ∣a∣| \mathbf { a } | .(c) Find the unit vector in the direction of b.

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