Question

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

Answer 1

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

$[-4,3 ]$

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

$[-4,-1)U(-1,3)$

And that's the final answer .