What Is The Lookup Function In Excel & How Do You Use It?
The lookup function in Excel can save you a lot of time and effort, but only if you actually know how to use its many forms ...
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Calculating the magnitude of a vector
If \(\overrightarrow {PQ} = \left( {\begin{array}{*{20}{c}} a\\ b\\ c \end{array}} \right)\) then the magnitude of \(\overrightarrow {PQ}\) is written as \(\left ...