Let P = ⎡⎢⎣11−12−343−23⎤⎥⎦ and Q = ⎡⎢⎣1−2− – InterviewSolution

1.	Let P = ⎡⎢⎣11−12−343−23⎤⎥⎦ and Q = ⎡⎢⎣1−2−161265105⎤⎥⎦ be two matrices. Then the rank of P + Q is
Answer» Let P = $⎡ ⎢ ⎣ \begin{matrix} 1 & 1 & - 1 2 & - 3 & 4 3 & - 2 & 3 \end{matrix} ⎤ ⎥ ⎦$ and Q = $⎡ ⎢ ⎣ \begin{matrix} 1 & - 2 & - 1 6 & 12 & 6 5 & 10 & 5 \end{matrix} ⎤ ⎥ ⎦$ be two matrices. Then the rank of P + Q is

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