Mathematics · Relations and Functions
Let R be a relation defined on the set {1, 2, 3, 4} × {1, 2, 3, 4} by R = {((a, b), (c, d)) : 2a + 3b = 3c + 4d}. Then the number of elements in R is:
- 115
- 212✓
- 318
- 46
Correct answer
12
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