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What is the number that should be multiplied to any rational number and the result is the rational number itself?

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1

- 1

0

the given rational number

answer is A.

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Detailed Solution

To find the number that should be multiplied to any rational number and the result is the rational number itself.
The product of

1

and any rational number is the rational number itself because

1

is the multiplicative identity for rational numbers.
Example,

\frac{3}{2}

when multiplied by

1

gives

\frac{3}{2}

itself, which is a rational number.
Hence, 1 is the number that can be multiplied to any rational number and the result is the rational number itself.
Therefore, option 1 is correct.

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