Question

3î-4k̂ ,Find the magnitude of the given vectors.

Answer 1

Hi , there !!!

magnitude is given by

√ 3² + 4²

=> √25


= 5


hope it helps !!

thanks !!

ranjan kumar

Answer 2

if a vector $\vec{r}=a\hat{i}+b\hat{k}+c\hat{j}$ is given then, magnitude of vector ,r is given by $|r|=\sqrt{a^2+b^2+c^2}$

here, $\vec{r}=3\hat{i}+(-4)\hat{j}$

now magnitude of r , |r| = $\sqrt{3^2+(-4)^2}$

$|r|=\sqrt{9+16}=5$

hence, magnitude of given vector is 5 unit.