If `a/(b+c)=b/(c+a)=c/(a+b)` then each fraction is equal to

Answer any one : If a/b+c = b/c+a = c/a+b, then prove that each ratio is equal to 1/2 or - 1.

If (ad -bd)/(a-b-c+d) =(ac-bd)/(a-b-d+c) , then show that each ratio is equal to (a+b+c+d)/4 .

if (a)/(b + c) = (b)/(c + a) = (c)/(a + b) and a + b + c = 0 : show that each given ratio is equal to -1 .

a(b-c) +b(c - a) +c(a-b) is equal to

If |(a-b-c, 2a, 2a),(2b, b-a-c, 2b),(2c, 2c, c-a-b)|=(a+b+c)(x+a+b+c)^2 then the value of x is equal to (A) -2(a+b+c) (B) a+b+c (C) -(a+b+c) (D) 2(a+b+c)

if (a)/(b + c) = (b)/(c + a) = (c)/(a + b) and a + b + c ne 0 , show that each given ratio is equal to (1)/(2) .

If |(a-b-c, 2a, 2a),(2b, b-a-c, 2b),(2c, 2c, c-a-b)|=(a+b+c)(x+a+b+c^2) then thhe value of x is equal to (A) -2(a+b+c) (B) a+b+c (C) -(a+b+c) (D) 2(a+b+c)

If a*b=b*c=c*a=0," then [abc] is equal to