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What are not well defined elements of a set?
Elements that have to be defined by personal judgement. Such as the set ofgreat songs is not well-defined. But the set of the English alphabet is well-defined.
Is the collection of the five best US museums well defined?
No. "Best" is not well defined since there are many criteria for defining best.
How do you describe and illustrate well defined sets?
The description of a well defined set clealy states what is in the set. For example, "deciduous trees" is a set that only includes trees that are deciduous. No conifers or non-deciduous trees are in the set. "Tall trees" is not well defined because the members of the set depends on what "tall" means to different people. Well-defined sets can be illustrated by using pictures of what would be inside and outside a circle to show which would and would not be in the set.
What is define sets?
A collected of well defined objects is called a set.
Is zero undefined?
Zero is pretty well defined. Division by zero is undefined.
