If both the roots of a(b−c)x2+b(c−a)x+c(a−b)=0 are equal, then a,b,c are in
The correct option is C H.P.
By observation, sum of coefficient =0, so x=1 is one root of the equation,
So both of the roots are 1,
Product of roots
a,b,c are in H.P.