100 GAUSSIAN ELIMINAONO the system Ax = b (where A is n n and nonsingular), MATLAB uses Gaussian elimination with partial pivoting to solve the system. If you want to see the LU decomposition, use the MATLAB command lu. Exercise 1.8.10 Use MATLAB to check the LU decomposition obtained in Example 1.8.2 Enter the matrix A, then type [L, U, P] = lu (A) . Once you have L, U, and P, you can put them back together by typing P'*L*U. (In MATLAB the prime symbol, applied to a real matrix, means "transpose") You can also try [K,V] = lu (A) , and see what that gives you. Give a matrix equation that relates K to L For a description of the lu command, type help lu or look in MATLAB's help browser