Question

if A=I+2j+4l and B=j+3k then A×B =

Answer 1

hope this helps you
regards nishita

Answer 2

$\bold{Answer :}$

The given vectors are

$\overrightarrow{A}=\hat {i}+ 2 \hat {j}+4 \hat {k} \\ \& \:\: \overrightarrow{B} = \hat {j}+3 \hat{k}$

Now, $\overrightarrow{A} \times \overrightarrow {B}$

$= \begin {vmatrix} \hat{i} & \hat {j} & \hat {k} \\1 & 2 & 4 \\ 0 & 1 & 3\end {vmatrix}$

$= (6-4)\hat{i} - (3-0)\hat{j} + (1-0) \hat{k}$

$= \boxed{\bold {2\hat{i} - 3\hat{j} + \hat{k} }}$

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