Mixed crossword

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Across
  1. 1. 9) a11=4 a12=2 a21=9 a22=7 Calculate the determinant
  2. 5. 5)2*3 matrix change 3*2 this prosses called…
  3. 6. 8)A matrix that is both upper and lower triangular is called…
  4. 8. 3)a11c11+a12c12+…a1nc1n What is this formula
  5. 9. 1)find y in this system
  6. 10. 4)A 4*7 has four columns [true ör false]
Down
  1. 1. 2)Find the rank of matrix {a11=1, a12=2, a13=4, a21=-1, a22=2, a23=1}
  2. 2. 11) What should a11,a22…ann equal[While finding the rank ]
  3. 3. 7)Cij=(-1)i+jMij What is the formula for this ?
  4. 4. 10)Which matrix has an inverse
  5. 6. 6)A square matrix A=[aij] for which every term off the main diagonal is zero, that is ,aij=0 for i≠j is called…
  6. 7. 12) (2;1),(3;1) based on the given coordinates m=?