If a,b,c are in A.P and if (b−c)x2+(c−a)+a−b=0 and 2(c+a)x2+(b+c)x=0 have a common root then
If a, b, c are in A.P., then (b+c)2-a2, (a+c)2 -b2, (a+b)2 -c2 are in....