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Question:

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.

Solution:

(i) The rational number that does not have a reciprocal is 0. (ii) 1 and -1 both are equal to their reciprocals. (iii) The rational number that is equal to its negative is 0.