A) 13
B) \[\frac{13}{3}\]
C) \[\frac{3}{13}\]
D) \[\frac{4}{13}\]
Correct Answer: A
Solution :
\[|\mathbf{a}+\mathbf{b}|\,=\,|3\mathbf{i}+4\mathbf{j}-12\mathbf{k}|\,=\,|\sqrt{{{3}^{2}}+{{4}^{2}}+{{12}^{2}}}|\,=13\] \[\therefore \,\,\,\mathbf{a}+\mathbf{b}=13\].You need to login to perform this action.
You will be redirected in
3 sec