Question

The unit vector of a vector Ā=2i+3j +4K is
(1)9/root29(i+j+k) (2) root29 (2î +3j+ 4k)
c)1/root29 (2i +3j+ 4k) (4) 9root29(i + j+k)

Answer 1

$\:\:\:\: \: \: \: \: \: \: \: \: \: \:\: \: \: \: \: \: \: \: \: \: \: \: \huge\mathcal{\bf{\underline{\underline{\huge\mathcal{Answer}}}}}$

$\large\mathcal\red{solution}$

the unit vector is .....

$= \frac{2i + 3j + 4k}{ \sqrt{2 {}^{2} + 3 {}^{2} + 4 {}^{2} } } \\ =\frac{2i + 3j + 4k}{ \sqrt{29} } \\ = \frac{2}{ \sqrt{29} } i + \frac{3}{ \sqrt{29} } j + \frac{4}{ \sqrt{29} }k \\ = \frac{1}{ \sqrt{29} } (2i + 3j + 4k)$

$\large\mathcal\red{hope\: this \: helps \:you......}$