Question

11 question ..........

Answer 1

Answer:

1/xyz (x^2+y^2+z^2)+2 (1/x+1/y+1/z)

=(x^2+y^2×z^2)/xyz+2 (yz+xz+xy)/xyz

=(x^2+y^2+z^2)/xyz+(2yz+2xz+2xy)/xyz

=(x^2+y^2+z^2+2yz+2xz+2xy)/xyz

=(x+y+z)^2/xyz