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Q.

What is the additive identity of rational number?


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a

0

b

1

c

-1

d

2  

answer is A.

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Detailed Solution

To find the additive identity of a rational number.
The set of rational numbers forms a group with respect to the addition of rational number in which the additive identity is 0.
As a+0=0+a=a for all rational a.
So, the additive identity is 0.
Hence option 1 is correct.
 
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