Q4Multiple choice
State which of the following statements are true and which are false. Justify your answer.
- (i)35 ∈ {x | x has exactly four positive factors}.
- (ii)128 ∈ {y | the sum of all the positive factors of y is 2y}
- (iii)3 ∉ {x | x4 – 5x3 + 2x2 – 112x + 6 = 0}
- (iv)496 ∉ {y | the sum of all the positive factors of y is 2y}.