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a set which has no elements in it is called a null set. example - A={}.
There are two ways of describing, or specifying the members of, a set. One way is by intensional definition, using a rule or semantic description:A is the set whose members are the first four positive integers.B is the set of colors of the French flag.The second way is by extension - that is, listing each member of the set. An extensional definition is denoted by enclosing the list of members in curly brackets:C = {4, 2, 1, 3}D = {blue, white, red}.
A set of three numbers.A set of three numbers.A set of three numbers.A set of three numbers.
A set is a well defined collection of elements
There are three simple ways to calculate the perimeter of a square.Add the length of all sidesAdd the height and width, and multiply the total times twoMultiply the length of any side times four.