Need solution for RD Sharma maths class 12 chapter 5 Determinants exercise multiple choise question 31
Correct option (c)
Simply solve the determinant and find .
Given that there are two values of which makes the determinant.
We have to find the sum of these two values of .
Here, we have
Expanding along R1, we get
Hence sum of the two values of = - 7 + 3 = -4.