Question

/3 -1/
/1 4/ find the value of the following determinant

Answer 1

Answer:

=(4*3-(1*-1)

=(12-(-1))

=12+1

=13

hope it's clear to you☺

Answer 2

ANS -  By cross multiplication we get  

          /3 - 1/ and /1 4/  =   [4*3-(-1*1 )]

          First we solve the small bracket

          [4*3-(-1)    

          12 - (-1)

formula =   - * -  =   +

           12 + 1

          =   13   ANS.