Write the set in roster form: {x : x = 7a, a∈N and 3<a≤7}
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Write the set in roster form: {x : x = 7a, a∈N and 3<a≤7}
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Answer:
{28, 35, 42, 49}
Step-by-step explanation:
We have,
A = {x : x = 7a, a ∈ N and 3 < a ≤ 7}
So,
a = {4, 5, 6, 7}
Then,
A = {(7 × 4), (7 × 5), (7 × 6), (7 × 7)}
A = {28, 35, 42, 49}
Hence,
In Roster form, we get,
{28, 35, 42, 49}
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