Question
If $\vec{A}-\vec{B}=\vec{A}+\vec{B}$, then the value of $\vec{B}$ will

Answer

 $ \vec{A}-\vec{B}=\vec{A}+\vec{B}$
$2 \vec{B}=0$
or
$\overrightarrow{B}=0$
Hence, the above equation will be true only when $\vec{B}$ is a zero vector.

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