document.write( "Question 1129197: Find the determinant of the matrix. Determine whether the matrix has an inverse, but don't calculate the inverse.\r
\n" ); document.write( "\n" ); document.write( "[2 1 0]
\n" ); document.write( "[0 -2 4]
\n" ); document.write( "[0 1 -3]\r
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Algebra.Com's Answer #745760 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "\"matrix%283%2C3%2Ca%2Cb%2Cc%2Cd%2Ce%2Cf%2Cg%2Ch%2Ci%29\"\r
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\n" ); document.write( "\n" ); document.write( "The determinant is:\r
\n" ); document.write( "\n" ); document.write( "\"D+=+a%28ei+-+fh%29+-b%28di+-+fg%29+%2B+c%28dh+-eg%29\"\r
\n" ); document.write( "\n" ); document.write( "\"matrix%283%2C3%2C2%2C+1%2C+0%2C%0D%0A0%2C+-2%2C+4%2C%0D%0A0+%2C1%2C+-3%29\"\r
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\n" ); document.write( "\"D+=+2%286+-+4%29+-+1%280%2A0%29+%2B+0%280%29\"
\n" ); document.write( "\"D+=+2%282%29\"
\n" ); document.write( "\"D+=+4\"\r
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\n" ); document.write( "\n" ); document.write( "the matrix
\n" ); document.write( "\"matrix%283%2C3%2C2%2C+1%2C+0%2C%0D%0A0%2C+-2%2C+4%2C%0D%0A0+%2C1%2C+-3%29\" have inverse because D = 4\r
\n" ); document.write( "\n" ); document.write( "If the determinant of the matrix is zero, then it will not have an inverse; the matrix is then said to be singular. Only non-singular matrices have inverses.\r
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