Does anyone know the mathematical definitipn for: 'Range Of Values'?

Question

I need the definition or explanation fast>

Answer 1

It means the set of the values a function can take on. For example, if f(x) = sin(x), x real, the the set of valures, or range, of f is the closed interval [-1, 1]. If f(x) = x^2, then the range of f is the set [0, oo).

It's costumary to say only Range, instead of Range of Values

Answer 2

Range of values means for a given expression or for a variable whose value is not always fixed,rather vary between two values(i.e.,max and min) under different conditions,like sin (x) varies from -1 to +1 for different x values.....

Answer 3

Range of Values

Suppose we want to see all friends with ages between 22 and 25. Figure [*] shows two queries that produce this result.

test=> SELECT *
test-> FROM friend
test-> WHERE age >= 22 AND age <= 25
test-> ORDER BY firstname;
firstname | lastname | city | state | age
-----------------+----------------------+-----------------+-------+-----
Dean | Yeager | Plymouth | MA | 24
Sandy | Gleason | Ocean City | NJ | 25
Victor | Tabor | Williamsport | PA | 22
(3 rows)

test=> SELECT *
test-> FROM friend
test-> WHERE age BETWEEN 22 AND 25
test-> ORDER BY firstname;
firstname | lastname | city | state | age
-----------------+----------------------+-----------------+-------+-----
Dean | Yeager | Plymouth | MA | 24
Sandy | Gleason | Ocean City | NJ | 25
Victor | Tabor | Williamsport | PA | 22
(3 rows)

The first query uses AND to perform two comparisons that both must be true. We used <= and >= so the age comparisons included the limiting ages of 22 and 25. If we used < and >, the ages 22 and 25 would not have been included in the output. The second query uses BETWEEN to generate the same comparison. BETWEEN comparisons include the limiting values in the result.

Answer 4

delta which look like a triangle