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4 cards from this section. Quick, good the night before a test.
What property ensures that the operation between any two elements of a group results in an element within the set?
Think about the 'closure' of a set.
What is the identity element when using multiplication in a group of non-zero real numbers?
What number keeps other numbers the same when multiplied?
Which property guarantees that the product of two elements is still within the set?
Think about what happens when you add two elements.
True or False: Every integer has a multiplicative inverse within the set of integers.
Consider if dividing integers always yields integers.
Create a set that fails to meet the group axioms and identify which axiom is violated.
Explore what happens with the operation on elements of this set.
Prove that addition of integers is a group.
Use the definitions of axioms to support your argument.
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