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[" 2.यदि "A=diag[1-12]" तथा "B=diag[23-1...

[" 2.यदि "A=diag[1-12]" तथा "B=diag[23-1]" हो "],[" तो "A+B" और "3A+4B" ज्ञात कीजिये। "]

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