" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
= [(1/x)^2 - (1/y)^2][(1/x)^2 + (1/y)^2] / [(1/x)^2-(1/y)^2]
= [(1/x)^2 + (1/y)^2]
= x^(-2) + y^(-2)