Question

If a=b=c is not equal to zero then using properties of determinants , prove that a=b=c.

Answer 1

let
a=b=c=k
so, a=k
b=k
c=k
so a=b=c proved

Answer 2

Let A = B = C = K

So, A = K
B = K
C = K

So, A = B = C.

Hence proved.