who can tell me what is the answer of 0^-1??????
Answer 1 : 0 is non-invertible element of field
. 
Answer 2 : What about 0^0?
Answer 3 :
Hexaditidom wrote:
What about 0^0?
It is quite meaningless untill you define what you mean.
Answer 4 :
Myth wrote:
0 is non-invertible element of field .
. ok but why when x>0 we say so 1/x>0 ?????
Answer 5 : It is an axiom
Answer 6 : Well if you define
to be the limit as x gets large of x^(1/x) your limit will approach 1. Thus, is 1. Well not really of course but you get the idea.