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If vectors v1 = 3i + 4j + k and v2 = i - j - k, determine the magnitude of v1 + v2.

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∴ Magnitude of (\(\vec{v_1} + \vec{v_2}\)),

|\(\vec{v_1} + \vec{v_2}\)| = \(\sqrt{4^2 + 3^2} = \sqrt{25}\) = 5 units.

Magnitude of \(\vec{v_1} + \vec{v_2}\) = 5 units.

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