Question

if xyz=1 .
prove that (1+x+y^-1)^-1+(1+z+x^-1)^-1+(1+z+x^-1)^-1=1

Answer 1

here assume x is equal to Y is equal to Z is equal to 1 because it satisfy the equation
X*Y *Z=1
LHS=1/3+1/3+1/3
=1
=RHS