Question

Which of the following is E ∪ F?

D = x is a whole number
E = x is a perfect square between 1 and 9
F = x

1. {4}
2. {3, 4, 5, 6, 7, 8}
3. {2, 3, 4, 5, 6, 7, 8}
4. {2, 4, 6, 8}

Answer 1

For E the answer is 2. Because the square of 1 is one and 9 is three. And 2 to the square root of two which would be 2 time 2= 4