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प्रश्न
Write the following sets in Roster form:
A = {x : x = y + 3, y ∈N and y > 3}
उत्तर
A = {x : x = y + 3, y ∈ N and y > 3}
x = y + 3
When y = 4,
When y = 5,
When y = 6,
When y = 7,
When y = 8,
...........................
...........................
x = 4+3 = 7
x = 5+3 = 8
x = 6+3 = 9
x = 7+3 = 10
x = 8+3 = 11
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............................
∴ Roster form of the given set A = {7, 8, 9, 10, 11 ...........}
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