Question

show tha√x¹y.√y¹z√z¹x=1 there x,y,z arw real number

Answer 1

see firstly you need to understand what is real number?

the number which contains a rational and irrational and a 0 is called a real number...
now if you see your question neatly you can see that weather the number will rational or irrational and its square root will be always irrational or rational ..
so now you can say that x y z are real number