Exercise · ZW-GROUP-004 · ★☆☆ Basic
What is the identity of (ℤ, +)?
Choose one option.
Show answer
- C. 0
Explanation
The identity of (ℤ, +) is 0, because n + 0 = 0 + n = n for every integer n.
Review the concept: Group
A group is a nonempty set \(G\) together with an associative binary operation, with an identity element and an inverse for every element.
\[(G,\ast)\]
More practice problems: group
- ZW-GROUP-001 Which list contains the axioms of a group?
- ZW-GROUP-002 Which structure is a group?
- ZW-GROUP-003 Why is (ℤ, ·) not a group?
- ZW-GROUP-005 What is the inverse of 3 in (ℤ, +)?
- ZW-GROUP-006 Which structure is a group with the indicated operation?
- ZW-GROUP-007 ℕ=\0,1,2,…\ with the usual addition is not a group because...
- ZW-GROUP-008 The identity of a group must...
- ZW-GROUP-009 Which of these conditions is NOT a group axiom?