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numbers that are not real numbers, such as the square roots of negative numbers. Imaginary numbers are also called unreal or non-real numbers.
statistical data organised in a table. The data may be grouped or ungrouped.
represents the rate of change or gradient of a function at any particular point.
quantities that can take many values; or letters that represent numbers in an algebraic...
a sequence of numbers that have a common difference between any two consecutive terms.