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" 3.Showthat,"|[b+c,a,a],[b,c+a,b],[c,c,...

" 3.Showthat,"|[b+c,a,a],[b,c+a,b],[c,c,a+b]|=4abc

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Prove that |[b+c,a,a],[b,c+a,b],[c,c,a+b]| = 4abc

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