1. Math
3. compute the cardinality of the following sets i 1 ...

# Question: compute the cardinality of the following sets i 1 ...

###### Question details

Compute the cardinality of the following sets.

(i). 𝑆1 = {𝑛𝜖ℕ | 𝑛 2 = −4}

(ii). 𝑆2 = {𝑥𝜖ℤ | 𝑥 2 > 0}

(iii). 𝑆3 = {𝑛𝜖ℕ | 3 < |𝑛| < 9}

(iv). 𝑆4 = {𝑥𝜖ℚ | 𝑥 2 = 2}