Question

7. Α = { x : x is a circle in a give plane} is …………. [ ]

( A ) Null Set
( B) Finite Set
(C) Infinite Set
(D) Universal Set​

Answer 1

Answer:

Option C

Step-by-step explanation:

Α = { x : x is a circle in a give plane} is an infinite set because we can draw ifinite number of many circles with different radii

Answer 2

Step-by-step explanation:

The set

n ∈ N : n = k

2

for some k ∈ N

is the set of perfect squares {1, 4, 9, 16, 25, . . . }. The set

{x ∈ R : 0 < x < 1}

is the open interval (0, 1).