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On integers, (aRb) is defined when (a\equiv b \pmod{4}). What is the correct reason for transitivity?

Answer and explanation

Correct answer: Because if (a-b) and (b-c) are divisible by (4), then (a-c) is also divisible by (4)

Step 1: (a\equiv b \pmod{4}) means (a-b) is divisible by (4). Step 2: Similarly, if (b-c) is divisible by (4), then (a-c=(a-b)+(b-c)) is also divisible by (4). Step 3: Adding differences is the key idea in congruence.

Related tags

Modulo 4CongruenceTransitive RelationClass 12Relations And FunctionsMathematicsClass 12 Mcq

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