Question

the magnitude of vector A=2i+j+2k is

Answer 1

solution:

vector A=2i+j+2k

magnitude of vector |A|=√|A|²x+|A|²y+|A|²z

in this formula x, y, & z only represents the coordinates not any mathematical variables.

putting the values in formula, we get

|A|=√2²+1²+2² =√4+1+4 =√9 = 3

the magnitude of the vector Is 3

Answer 2

Answer:

3

Explanation

using

                            IAI = √Ax²i+Ay²j+Az²k

i+j+k are vectors

we take them as  common vectors and they are removed

now

lAl = √Ax²+Ay²+Az²    

IAI = √2²+1²+2²

IAI = √4+1+4

IAI = √9

     =√3²

     = 3