Question

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

Answer 1

∴ 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.