Solution for Section 2.1 Question 2

2. a) False. 0 is a real number but 0² 2.

b) True. R, and  ()² = 2.

c) True. 1² = 1 < 10,  2² = 4 < 10 and 3² = 9 < 10, so x² < 10 for all elements of the set A.

d) False. There does not exist an element of A which is greater than 4.

Back to Section 2.1