If `z = x + iy, z^(1//3) = a - ib ` , then ` x/a - y/b = ka^2 - b^2 ` , where k is equal to :

If x + y + z = 0 , then ( x + y - z)^(3) + ( y + z - x)^(3) + (z + x - y) ^(3) = k (xyz) , where k is equal to :

If z=x+ iy,x,y real,then |x|+|y|<=k|z| where k is equal to :

z=x+iy,z^(1/3)=a-ib,(x)/(a)-(y)/(b)=k(a^(2)-b^(2)) then k is :

If z=x+iy,x,y real , then |x|+|y|lek|z| where k is equal to :