determinant properties question
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Step-by-step explanation:
if we expand det we get R.H.S
1+a((1+b)(1+c)-1) -1(1+c-1) +1(1-(1+b))
1+a(1+b+c+bc-1)-c-b
=b+c+bc+ab+ac+abc-c-b
=bc+ab+ac+abc.
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