Question

if the value of the determinant is -42, then find the value of 'm'.|20 m. 1 -2|<​

Answer 1

Answer:

If the value of determinant ∣∣∣m6−54∣∣∣|m6−54| is 5858, then find the value of mm.

Solution

 ∣∣∣m6−54∣∣∣|m6−54| is 5858, 

4m−(−5)×6=584m−(−5)×6=58

4m+30=584m+30=58

4m=28∴m=7