[" 38.If "a,b,c" are the sides of a triangle "ABC],[" such that "],[x^(2)-2(a+b+c)x+3 lambda(ab+bc+ca)=0],[" has real roots,then "]

If a,b,c, are the sides of a triangle ABC such that x^(2)-2(a+b+c)x+3 lambda(ab+bc+ca)=0 has real roots,then (a)lambda (5)/(3)(c)lambda in((4)/(3),(5)/(3)) (d) lambda in((1)/(3),(5)/(3))

If a, b, c are the sides of a triangle ABC such that x^2+2(a+b+c)x+3lambda(a b+b c+c a)=0 has real roots.then

If a, b, c are sides of a triangle, then ((a+b+c)^(2))/(ab+bc+ca) always belongs to

If a, b, c are sides of a triangle, then ((a+b+c)^(2))/(ab+bc+ca) always belongs to

If a, b, c are sides of a triangle, then ((a+b+c)^(2))/(ab+bc+ca) always belongs to

If a,b,c are the sides of a triangle then the range of (ab+bc+ca)/(a^(2)+b^(2)+c^(2)) is

Let a,b,c be the sides fo a triangle where anebnec and lamdainR ,if roots of the equation x^2+2(a+b+c)x+3lamda(ab+bc+ca) =0 are real, then