$(1, 2, 2)$

Example · High school

Terms

Term	This example	Why
sequence	✓	$(1, 2, 2)$ is a sequence of length three, and so an indexed family, which is different from $(2, 1, 2)$ and from $(1, 2)$.
indexed family	✓
set	✗
multiset	✗

Distinctions using this example

• Types of collections

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