D= {x|x is a whole number} e = {x|x is a perfect square between 1 and 9} f = {x|x is an even number greater than or equal to 2 and less than 9} e∪f is {2,4,6,8} true false

If 1 and 9 are still considered part of E (they are perfect squares of 1 and 3),they should be considered also in EUF, so it would be false. If in E are just considered numbers BETWEEN 1 and 9, the answer is correct