Question

If the value of the determinant
4 m
2 7
is 34.

Answer 1

Answer:

$|4 \: \: \: \: \: \: \: \: m | \\ \: \: \: \: \: \: \: \: \: \: \: \: |2 \: \: \: \: \: \: \: \: \: \ \: \ 7| = 34$

=>(7×4)-(m)(-2)=34

=> 24+2m = 34

= > 2m =34-24

=>2m =10

=>m =10/2

=>m =5