Can anyone tell me about the domain and range symbols and what they mean?

Question

Like (, and [ and infinity and -infinity.

and also the U

Answer 1

they explained is right i have nothing to give to you but
if they are linear like y=3x+5 or somethinglike this form y=mx+b
domaiin is always all real number(-infinity, infinity)
range is always all real number(-infinity, infinity)
if they are parabola like y=3x^2+3x+2 or something like this form y=ax^2+bx+c
domain is all real number(-infinity, infinity)
range is [ yintercept,infinity) yintercept is c
if they are circle
domain is from[ -radius,radius]
range is the same domain
good luck

Answer 2

Domain And Range Symbols

Answer 3

Domain is all the possible x values for an equation, or inputs.
Range is all possible outputs, or y values.
These are bound in parentheses (), or brackets []
The symbol ( indicates that you don't include the bound. for example, x>0 would be (0, infinity], because everything greater than zero, zero not included, is possible, and infinity is included.
The symbol [ indicates that you do include the bound.
If x Sorry to be confusing!

Answer 4

Of course. Let's say you have a line, it doesn't matter what. Look at its graph from the left to right. Do you see it extends forever in both directions? Therefore, its domain is (-infinity, infinity). The same thing is with its range, it goes forever down to up.

Think about the graph of a parabola centered at (0,0). From left to right it goes forever, so domain is (-infinity, infinity). But from down to up, it only starts at 0 and then goes forever up. So, it's range is [0, infinty).

( and ) mean noninclusive, and [ and ] mean the graph include the number. With infinity we use ( and ) because you can't technically reach infinity.

Answer 5

The domain of a function is all the values that can be put in for x without the equation becoming undefined. The range of a function is the numbers that y can be as a result from x.

Answer 6

The difference between ( and [ is whether the endpoint is included. For example, (0,5] means all values greater than 0 and less than or equal to 5, so 0 is not included, but 5 is.

You know what infinity is, - infinity means the same thing in the opposite direction, so (-infinity, 0) means all numbers less than 0.

The U means a union of two sets of numbers. For example (0,5] U (-infinity,0) means all numbers less than 5 EXCEPT for 0, because it's not inclueded in the UNION of the two sets.

Answer 7

just to clarify above answer..

If you have the interval, say [1,2]
this means everything between 1 and 2 .. including 1 and 2.

If you have (1,2]
we have everything between the numbers 1 and 2, including 2, but not 1..

But like she said, you'll never see [-infinity, infinity]
Why, because technically, we cannot reach infinity so it is not included.