Question

Write in tabular form { x : x is a perfect number ; x < 40}

• A. {12, 24}
• B. {8, 32}
• C. {10, 20}
• D. {6, 28}

Answer 1

Answer:

D. {6, 28}

A = { x : x is a perfect number ; x < 40} A = {6, 28} a perfect number is a positive integer that is equal to the sum of its positive proper divisors, that is, divisors excluding the number itself.