Question

what is the numerical
value of the vector 3i^+4j^+4k^​

Answer 1

Answer:

5 √ 2

Explanation:

Given :

A vector :

$\displaystyle{\vec{A}=3\hat{i}+4\hat{j}+4\hat{k}}$

We have to its magnitude :

In order to find magnitude of any vector :

Use direct formula i.e.

$\displaystyle{Magnitude=\sqrt{A^2+B^2+C^2}}$

That mean square sum of all unit vectors then take it in square root .

Using this concept here :

Let say magnitude be λ

λ = √ ( 3² + 4² + 5² )

λ = √ ( 9 + 16 + 15

λ = √ 50

λ  =  5 √ 2

Hence we get answer .

Answer 2

Answer:

For showing full answer click on photo .