1.

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−1=0}(iv) {x:x ∈ N and x is prime}(v) {x:x ∈ N and x is odd}

Answer» 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−1=0}

(iv) {x:x ∈ N and x is prime}

(v) {x:x ∈ N and x is odd}


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