a Describe in words the sets C1 C0 C4SolutionaC1is a circle

a) Describe in words the sets C_-1, C₀, C₄

Solution

a)C-1is a circle with centre at origin and radius i.C0 is the line y=+_x.,a straight passing through origin,C4 is a circle with centre at origin and radius 2.

b)It is a family of concentric circles with centre at origin and the larger circle has radius 1.all other cicles has radius less than 1.

C)It is thecollection of discrete set of points.