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Q.

For any rational number ab, what is its additive inverse?


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a

ba

b

-ba

c

ab

d

-ab  

answer is D.

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Detailed Solution

The given expression is ab.
If ab is a rational number, then its negative -ab is called the additive inverse of ab.
Thus, the additive inverse of ab is -ab.
Therefore, the correct option is 4.
 
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