Binary Operations — Practice Quiz
ICSE · Class 12 · Mathematics
Try a 4-question quiz on Binary Operations for ICSE Class 12 Mathematics: tap an answer to check it and see why. 101 questions in the full chapter test.
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Quick Quiz: Binary Operations
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A binary operation * on set A is a function *: A × A → A. This means for every a, b ∈ A, a*b must:
Which of the following is NOT a binary operation on ℕ?
The number of binary operations that can be defined on a set with 2 elements is:
A binary operation * is commutative if:
Sample Questions
A binary operation * is associative if:
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(a*b)*c = a*(b*c) for all a, b, c ∈ A
Associativity means grouping (brackets) doesn't matter: (a*b)*c = a*(b*c) for all elements.
The identity element e for addition on ℝ is:
The identity element for multiplication on ℝ is:
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1
a × 1 = 1 × a = a for all a ∈ ℝ. So 1 is the multiplicative identity.
The inverse of element a under addition on ℝ is:
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−a
a + (−a) = 0 = identity. So the additive inverse of a is −a.
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