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आव्यूहों  \(\begin{bmatrix}-4 & 4&4\\[0.3em]-7&1&3\\[0.3em]5&-3&-1 \\[0.3em] \end{bmatrix}\) तथा  \(\begin{bmatrix}1 & -1&1\\[0.3em]1&-2&-2\\[0.3em]2&1&3 \\[0.3em] \end{bmatrix}\) गुणनफल ज्ञात कीजिए तथा इसकी सहायता से निम्नलिखित समीकरण निकाय को हल कीजिए।

x – y + z = 4, x – 2y – 2z = 9, 2x + y + 3z = 1

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माना A =\(\begin{bmatrix}-4 & 4&4\\[0.3em]-7&1&3\\[0.3em]5&-3&-1 \\[0.3em] \end{bmatrix}\) तथा B =\(\begin{bmatrix}1 & -1&1\\[0.3em]1&-2&-2\\[0.3em]2&1&3 \\[0.3em] \end{bmatrix}\) 

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