$1$ and $\setdef{1, 2}$
Terms
| Term | This example | Why |
|---|---|---|
| element of | ✓ | $1$ is an element of $\setdef{1, 2}$ because it is listed in the set. |
| subset | ✗ | $1$ is not a subset, because it is not a set of elements of $\setdef{1, 2}$. |
| proper subset | ✗ |
| Term | This example | Why |
|---|---|---|
| element of | ✓ | $1$ is an element of $\setdef{1, 2}$ because it is listed in the set. |
| subset | ✗ | $1$ is not a subset, because it is not a set of elements of $\setdef{1, 2}$. |
| proper subset | ✗ |