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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)

.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
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

5) r (x, y) xy x 3y 1 0
.....................................................................................................................................
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.....................................................................................................................................
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6) r

(x, y) y

x
x

2
1

.....................................................................................................................................
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.....................................................................................................................................
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7) r

(x, y) y

2x
3x

3
5

.....................................................................................................................................
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ใบงานที่ 3

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