Question

5. If A = {1, 2, {3}} write the subsets of A and the
number of elements of the power set of A
6. The number of nonempty subsets of the set
{ 1,2,3,4} is
7. Let A = 1, 2, {3,4), 5). Which of the following
statements is incorrect? Why?
(a) {3,4} CA (b) {3,4} E A
(c) { {3,4)} C A (d) 1 E A
(e) 1 CA
(f) {1, 2, 5} € A
(g) {1, 2, 5} CA (h) {1,2,3,4} CA​

Answer 1

If A = {1, 2, {3}} write the subsets of A and the

number of elements of the power set of A

6. The number of nonempty subsets of the set

{ 1,2,3,4} is

7. Let A = 1, 2, {3,4), 5). Which of the following

statements is incorrect? Why?

(a) {3,4} CA (b) {3,4} E A

(c) { {3,4)} C A (d) 1 E A

(e) 1 CA

(f) {1, 2, 5} € A

(g) {1, 2, 5} CA (h) {1,2,3,4} CA --