umakant the ques i have posted is absolutely right and i have solution too but there was some problem that is why i posted this ques

@ rishant , 
NO, how we can write , that number in the form of 1/n1 square – 1/n2square 
there is no possibilities of that , and there is no other way also to solve that question .. 
if u have solution then kindly post it here or tell me only the answer . 
otherwise , how u knw that the solution which u hv is right , ?? 
WAITING TO HEAR FROM YOU AGAIN ..