If `(b+c-a)x=(c+a-b)y=(a+b-c)z=(a+b+c)`, then `1/x+1/y+1/z=?`

If (x)/(b + c - a) = (y)/(c + a - b) = (z)/(a + b - c) , then value of x(b -c) + y(c -a) + z(a - b) is equal to

If x=(b-c)(a-d),y=(c-a)(b-d),z=(a-b)(c-d) , then the what is x^(3)+y^(3)+z^(3) equal to?

If x=(a+b)/(a-b),y=(b+c)/(b-c),z=(c+a)/(c-a) then the value of ((2x+2)(4y+4)(z+1))/((x-1)(y-1)(z-1)) is equal to

If (x)/((b-c)(b+c-2a))=(y)/((c-a)(c+a-2b))=(z)/((a-b)(a+b-2c)) then the value of (x+y+z) is :

If (a+b)/(x)=(b+c)/(y)=(c+a)/(z), then (A) (a+b+c)/(x+y+z)=(ab+bc+ca)/(ay+bz+cx)(B)(c)/(y+z-x)=(a)/(x+z-y)=(b)/(x+y-z)(C)(c)/(x)=(a)/(y)=(b)/(z)(D)(a+b)/(b+c)=(a+b+x)/(b+c+y)

If x = (a-b)/(a+b) , y = (b-c)/(b+c), z = (c-a)/(c+a) , " then " ((1-x)(1-y)(1-z))/((1+x)(1+y)(1+z)) is equal to