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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Thanu dharshani 1
how det of a is zero
by the definition of rank of matrix if rank(A)
if n=3??
if n=3 then Det(A) not equal to zero...and det(B) is + - 1 .....det(AB) also not equal to zero....in this case AB is nonsingular