Using co-factors of third column, evaluate: math xmlns=http://www.w3.org/1998/Math/MathMLmi&Delt...

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Using co-factors of third column, evaluate:
math xmlns=http://www.w3.org/1998/Math/MathMLmiΔ/mimo=/momfenced open=| close=|mtable columnalign=leftmtrmtdmn1/mn/mtdmtdmix/mi/mtdmtdmiy/mimiz/mi/mtd/mtrmtrmtdmn1/mn/mtdmtdmiy/mi/mtdmtdmiz/mimix/mi/mtd/mtrmtrmtdmn1/mn/mtdmtdmiz/mi/mtdmtdmix/mimiy/mi/mtd/mtr/mtable/mfenced/math.
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