Which is true according to idempotent Law?

a + a = a

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a + b = a

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a + a b = a

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None of these

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Solution

The correct option is B $a + a = a$
In Boolean algebra, Idempotent Law states that combining a quantity with itself either by logical addition or logical multiplication will result in a logical sum or product that is the equivalent of the quantity.
So, $a + a = a$

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