The symbol "Q*" in math typically refers to the set of rational numbers. These are numbers that can be expressed as a ratio of two integers, such as 1/2 or 3/4.
The symbol "Q" in math refers to the set of rational numbers as well. However, "Q*" is often used to specifically denote positive rational numbers, while "Q" can include both positive and negative rational numbers.
When a number is in "Q*", it means that it can be written as a ratio of two integers, and that the ratio is positive. For example, 3/4 is in "Q*" because it can be written as a ratio of 3 and 4, and the ratio is positive. However, -3/4 would not be in "Q*" because the ratio is negative.
"Q*" can be represented on a number line by marking the positive rational numbers, starting from 0 and moving to the right. This would include all numbers that can be expressed as a ratio of two positive integers, such as 1/2, 3/4, and 5/6.
"Q*" is an important concept in math because it represents a fundamental set of numbers that are used in everyday calculations and applications. Rational numbers are used in measurements, finance, and many other real-life situations, making "Q*" an essential concept to understand in math.