Question

describe the difference between the symbols ∈ and ⊆. explain how each symbol is used. the symbol ∈ means and the symbol ⊆ means for example, ∈{1, 2, 3} and ⊆{1, 2, 3}.

Explanation:

The symbol $\in$ denotes membership of an individual element in a set, meaning "is an element of". The symbol $\subseteq$ denotes that one set is a subset of another, meaning "is a subset of" (all elements of the first set are in the second set). For the examples, a single element like 1 belongs to $\{1,2,3\}$, and a set like $\{1,2\}$ is a subset of $\{1,2,3\}$.

Answer:

The symbol $\in$ means is an element of and the symbol $\subseteq$ means is a subset of. For example, $\boldsymbol{1} \in \{1, 2, 3\}$ and $\boldsymbol{\{1,2\}} \subseteq \{1, 2, 3\}$.