Question

The value of “m”if i+2j-3k
is parallel to 3i+mj-9k is

Answer 1

$\large\rm { \hat{i} +2 \hat{j} - 3 \hat{k}}$

$\large\rm { 3 \hat{i} + m \hat{j} + 9 \hat{k} }$

$\large\rm { \frac {1}{3} = \frac {2}{m} = \frac {-3}{-9} \leadsto \frac {2}{m} = \frac {1}{3}}$

$\large\boxed{\rm { \therefore m = 3}}$