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Similar to ใบงานที่ 3 (8)
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ใบงานที่ 3
- 1. ใบงานที่ 3
ชื่อ.....................................................................................ชั้น.....................เลขที่...........
จงหาโดเมนและเรนจ์ของความสัมพันธ์ต่อไปนี้
1) r
(1, 2),(2, 3),(3, 4),(4, 5)
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2) r
(1, 4),(3, 6),(5, 8),(7, 9)
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3) r
(x, y) A B y x 1 เมื่อ A
1, 2, 3 และ B
2, 3, 4
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4) r
(x, y) y
3x
2
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- 2. 2
5) r (x, y) xy x 3y 1 0
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6) r
(x, y) y
x
x
2
1
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7) r
(x, y) y
2x
3x
3
5
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