Question

If v, = 3i+4j+k and v2 = i- j-,
determine the magnitude of V, +V2.
[Ans: 5]​

Answer 1

Answer:

v1= 3i+4j+k

v2=i-j

so,

v1+v2=(3+1)i+(4-1)j+k

=4i+3j+k

therefore,

magnitude = |v1+v2|

=√4^2+3^2+1^2

=√16+9+1

=√26