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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Gattu uday
determinants are may not be equal , but ranks must be equal and rank is order of the matrix ,because if the rank is less than n means det of A =0, in that case Inverse not possible ,here Inverse existed as B soo det of A is not 0, hence B is also invertible matrix ,hence rank of A is equal to rank of B ☺️