The only proper subset of a set comprising one element, is the null set.
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There is only one element in the given set: {36912}. Therefore the only proper subset is the null set.
Assuming no restrictions on the set, the cardinality of a set, n, is related in this form # of subsets = 2n
First, You have to reduce the matrix to echelon form . The number of nonzero rows in the reduced echelon form matrix (number of linearly independent rows) indicates the rank of the matrix. Go to any search engine and type "Rank of a matrix, Cliffnotes" for an example.
A 7*2 matrix (not matrice) and a 2*6 matrix, if multiplied together, will from a 7*6 matrix.
It is a singular matrix.
It is a singular matrix.