BCA MATHS

DETERMINANT

EXERCISE - 1

1) Find the cofactors and minors of 3, -2 in the determinant:
   3      -2      5
  -1       2     -3
  -5       6      9           36,36; 24,-24

2) In     3      -2       5
            -1       2      -3
            -5       6       9 The minor and cofactors of -2 are respectively
a) -24,24 b) 24,-24 c) -24,-24 d) none

3) Find the cofactors and minors of a, h in the determinant 
  a        h       g
  h        b       f
  g        f        c.        bc- f², bc- f²; gf - ch, ch - gf

4) Ig ∆= 0        2       4
              -3        0      -1 
               5       -2       7 then the minor of the element 2 is
a) -16 b) 16 c) 14 d) none

5) If ∆= 1     2       3
             -3     0      -1
              5    -6       7 then the cofactor of the element 2 is
a) 16 b) -16 c) 14  d) none

6) If ∆= 0     1       4
             -3     0      -1
              5     -2      7 then the minor of the elements 4 is
a) 6 b) 8 c) 16  c) none

7) If ∆= 3      9       4
             -1      2      -3
             -5      6       9 then the cofactor of the elements 5 is
a) - 4b) 4 c) 16 c) none



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