Question

If \\(a=3i-2j+k\\), \\(b=2i-4j-3k\\) and \\(c=-i+2j+2k\\), find the magnitude of \\(a+b+c\\)

Answer 1

$\\a=3i-2j+k\\ \\b=2i-4j-3k\\ \\c=-i+2j+2k\\a+b+c=4i-4j$

its magnitude will be $\sqrt{4^2+4^2}=4\sqrt2$