Write the set of points from -4 to 3 but excluding -1 and 3 as a union of intervals

In this question, we have to write a set of points  from -4 to 3 but excluding -1 and 3 as a union of intervals .

Set of points from -4 to 3 can be written as

But we need to exclude -1 and 3 and write the final answer in union of sets .

So we put -1 and 3 in the intervals and put () with these numbers, that is

And that's the final answer .

definition: a circle is the  set of all points in a plane that are equidistant  from a given  point  called the center of the circle. we use the symbol ⊙ to represent a circle. the a line segment from the center of the circle to  any point  on the circle is a radius of the circle.

step-by-step explanation:

i googled it and this is what i got i don't know how it is. sorry.