Question

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

Answer 1

v1+v2=4i^+3j^

|v1+v2|=

$\sqrt{4 {}^{2} } + \sqrt{} 3 {}^{2}$

=√16+9

=√25

=5