Question

E symbol means in sets lsn​

Answer 1

Answer:

Question : What does this ∈ symbol mean?

Answer:

This symbol means if one particular element/set belongs into another set.

Let's take an example.

We know that Z denotes integers.

So we can say that -1 is a part of a set that denotes integers, namely Z.

Hence we can simply write it as -1 ∈ Z