(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 . So for 0, its reciprocal is not defined.
(ii) 1 and -1 . (Since and )
(iii) Zero,0. (as -0=0)
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