LetA=[4326].Express the identity matrix, I, as UA = I where U is a product of elementary matrices. Elementary matrices: An×nmatrix that can be determined from then×nidentity matrix by performing one elementary row operation is known as...
Express the column matrix {\bf{b as a linear combination of the columns of {\bf{A. {\bf{A = \left {\matrix{ 1 & 1 & { - 8} \cr 1 & 0 & { - 1} \cr 6 & { - 1} & { - 1} \cr } } \right, \ \ \ \ \ {\bf{b = \left {\mat...