uppose p is a prime number. Find all integers in {gcd(p, z) : z ∈ Z}
Question
uppose p is a prime number. Find all integers in {gcd(p, z) : z ∈ Z}
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Solution
The set of integers {gcd(p, z) : z ∈ Z} where p is a prime number will contain only two elements: 1 and p.
Here's why:
- If z is a multiple of p, then gcd(p, z) = p.
- If z is not a multiple of p, then gcd(p, z) = 1. This is because p is a prime number and has no other divisors except 1 and itself.
So, the set {gcd(p, z) : z ∈ Z} = {1, p}.
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