Question

State which of the following sets are finite or infinite.
(i) {x : x ∈ N and (x − 1) (x − 2) = 0} (ii) {x : x ∈ N and x2 = 4}
(iii) {x : x ∈ N and 2x − 2 = 0} (iv) {x : x ∈ N and x is prime}
(v) {x : x ∈ N and x is odd}

Answer 1

(V) is a infinite set