Question

two questions as review from last semester i had question about -
How to write the domain of a function?
How to write the range of a function?

Answer 1

domain of f is all the possible x values the function can have input
the range is all the possible values that are output from the function

Answer 2

ok so like in equation form how might this look?

Answer 3

@hysusonic

Answer 4

this would be lots easier if you had an example

Answer 5

if the function is written as an equation, then you would write the domain probably in interval notation
if it is given by ordered pair, then it would be a list

Answer 6

depends on the function

if you have function
f(x)=x+2
you know all x values can be from negative infinite to infinite
so your domain is all x that exist in reals
domain of f:\[(-\infty, \infty)\]
or \[\forall x \epsilon \mathbb{R} \]

Answer 7

ohhh so domain is like an ordered pair i think i understand now :) thanks :D I'm going to try to review with worksheets online :P When I'm done can someone maybe check? I am in semester two but i found this to be my hardest topic in semester 1 thats why I'm trying to get some clarification :P lol

Answer 8

no dear the domain is not an ordered pair

Answer 9

the domain is an INTERVAL usually

Answer 10

you can write an interval as say \(0<x<10\) or \((0,10)\) but that means the interval, not the point

Answer 11

ohhhh give me an example of a function and i will try to make it a domain @misty1212

Answer 12

like a function given by an equation? like say
\[f(x)=\frac{x+1}{x-2}\]?

Answer 13

thanks misty xD thanks so much xD thats hard lol ok let me think whats the first number of the function like f(0) like 0 = what?

Answer 14

for the one i wrote above, you cannot divide by zero, so you would set \(x-2=0\) and solve for \(x\)
then the domain would be all numbers except that one

Answer 15

f(3) so all real numbers except 3?