Do the matrices (49) form an LU decomposition of a matrix AER 2x2? If so, what is A₁1? L = and 6 - (312) U = a. There exists no matrix AER 2x2 such that L and U form an LU factorisation of A. O b. A₁1=0 O c. A11=1 O d. A11=2 O e. A₁1=3 O f. A11=4 O g. A₁1=6 Oh. A11=7 Oi. A₁1-12 O j. A11=36

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