Get All Real Numbers Except 1 Interval Notation Gallery. The third method is interval notation, in which solution sets are indicated with parentheses or brackets. Introducing intervals, which are bounded sets of numbers and are very useful when describing domain and range.
Any real number less than 3 in the shaded region on the number line will satisfy at least one of the two given inequalities.
A bigger number will always be found to the right of a smaller number. On the one hand, i am glad that interval notation is taught in american high schools. Suppose i give you (5,8) and here i use parentheses instead of those bracket symbols. The domain of a rational function is all real numbers except the values for x where the denominator is zero.