Question
Let \overrightarrow a =i+j and \overrightarrow b=2i-k, then point of intersection of the lines \overrightarrow r×\overrightarrow a=\overrightarrow b×\overrightarrow a and \overrightarrow r×\overrightarrow b=\overrightarrow a×\overrightarrow b is