Answers

2016-06-23T15:40:35+08:00
 Let P = {5, 10, 15, 20, 25, 30}

Then, P is a finite set and n(P) = 6.

2. Let Q = {natural numbers less than 25}

Then, Q is a finite set and n(P) = 24.

3. Let R = {whole numbers between 5 and 45}

Then, R is a finite set and n(R) = 38.

4. Let S = {x : x ∈ Z and x^2 – 81 = 0}

Then, S = {-9, 9} is a finite set and n(S) = 2.

5. The set of all persons in America is a finite set.

6. The set of all birds in California is a finite set.


0