Question

Which rational number has no reciprocal?​

Answer 1

Amswer:

The reciprocal of 1 is 1 and the reciprocal of -1 is -1. 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:

zero. has no reciprocal.

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