Magnitude of $$$\left\langle 1, -3, -4\right\rangle$$$

The calculator will find the magnitude (length, norm) of the vector $$$\left\langle 1, -3, -4\right\rangle$$$, with steps shown.
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Your Input

Find the magnitude (length) of $$$\mathbf{\vec{u}} = \left\langle 1, -3, -4\right\rangle$$$.

Solution

The vector magnitude of a vector is given by the formula $$$\mathbf{\left\lvert\vec{u}\right\rvert} = \sqrt{\sum_{i=1}^{n} \left|{u_{i}}\right|^{2}}$$$.

The sum of squares of the absolute values of the coordinates is $$$\left|{1}\right|^{2} + \left|{-3}\right|^{2} + \left|{-4}\right|^{2} = 26$$$.

Therefore, the magnitude of the vector is $$$\mathbf{\left\lvert\vec{u}\right\rvert} = \sqrt{26}$$$.

Answer

The magnitude is $$$\sqrt{26}\approx 5.099019513592785$$$A.