document.write( "Question 575851: Suppose A is a 5 x 3 matrix, B is an r x s matrix and C is a 4 x 5 matrix. If At BC is defined, which one is true? ( the t after A means inverse)
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document.write( "1) the size of At BC is 3 x 5
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document.write( "2) r = 2, s = 5
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document.write( "3) r = 3, s = 4
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document.write( "4) r = 3, s = 5 \n" );
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Algebra.Com's Answer #369640 by jim_thompson5910(35256)![]() ![]() ![]() You can put this solution on YOUR website! In order for BC to be defined, B must have 4 columns. So s = 4. This means that the resulting matrix BC is a r x 5 matrix\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Matrix A is a 5 x 3 matrix. So \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So BC must have 5 rows in order for \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So the answer is choice 1) \n" ); document.write( " |