In a × 1 = a = 1 × a and ∀ a ∈ R then '1' is called?
- Multiplicative identity
- Additive identity
- Additive inverse
- None of these
Explanation
The number 1 is called the multiplicative identity because multiplying any real number a by 1 leaves it unchanged: a × 1 = 1 × a = a.
This property holds for all real numbers (∀ a ∈ R).
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