# Q10.Write.(i) The rational number that does not have a reciprocal.(ii) The rational numbers that are equal to their reciprocals.(iii) The rational number that is equal to its negative.

(i) Zero(0).      We know that reciprocal of A is $\frac{1}{A}$. So for 0, its reciprocal is not defined.
(ii) 1 and -1 .                                                    (Since  $\frac{1}{1} = 1$  and   $\frac{1}{-1} = -1$  )