Question

which rational number are their own multiplicative inverse??​

Answer 1

Answer:

1 and -1 are the only rational numbers which are their own reciprocals. No other rational number is its own reciprocal. We know that there is no rational number which when multiplied with 0, gives 1. Therefore, rational number 0 has no reciprocal or multiplicative inverse.

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Answer 2

Answer:

1 and -1 are the only rational number which are their own multiplicative inverse.