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Q.

The additive identity for integers is _________.

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a

2

b

1

c

-1

d

0

answer is B.

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Detailed Solution

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An identity element in a given mathematical system leaves unchanged any elements to which it is added. 

We know that any number added to 0 is still the same number and hence for any integer we will have: 

a + 0 = a = 0 + a.

Therefore, 0 is an additive identity.

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