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# Write an additive inverse and multiplicative inverse of a rational number.

Last updated date: 20th Jun 2024
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Hint: In the above given question we are asked to write the additive inverse and multiplicative inverse of a rational number. For additive inverse, the sum of rational number and its inverse should be equal to zero. For multiplicative inverse, the multiplication of a rational number with its reciprocal should be equal to 1.

Let us assume a rational number be $a$.
Now, we know that the additive inverse of a number $a$ is the number that, when added to $a$, yields zero
$\Rightarrow a + ( - a) = 0$
Therefore, the additive inverse of $a$ is $- a$.
$\Rightarrow a \times \dfrac{1}{a} = 1$
Therefore, the multiplicative inverse of $a$ is $\dfrac{1}{a}$ .
Hence, the additive inverse of $a$ is $- a$ and the multiplicative inverse of $a$ is $\dfrac{1}{a}$.