you need the domain and range?
yes for both of them
Do you know how to graph them?
yes i was getting like 0, infinity and stuff like that but wasn't sure if it was right
ok what did you get for sqrt(3x)?
let me check real quick
ok i had x>=0 for domain and y<=0 for range
the second one went a little like domain 3/5 and range 0
range of 0 is not possible
okay. i knew i didn't know what i was doing..
Domain is how far left and right (on x-axis) the graph goes.
Range is how far up and down(on y-axis) the graph goes
okay. makes sense.
now how would i figure it out?
i would rather have help then get it wrong again..
By using the graph.
Look at the graph how far to the left does it go?
What x value?
ok now how far to the right?
it doesn't have a endpoint.
exactly so for domain the common way of writing it is (left farthest x-value,right farthest x-value)
so it'll be 0, infinity?
so here it's [0,infiniti)
okay now the range.
keep in mind the graph does touch 0 so you have to use a bracket. You use the parenthesis when you don't touch the value. Since we never touch infinity we use a parenthesis.
Ok now range
What's the lowest point?
okay. thanks for letting me know that because i wasn't even using those.
Ok and we do touch 0 correct?
ok so the first part of the range is [0,
now what's the highest point?
and it'll be infinity again right?
Exactly, and because we don't touch it we use parenthesis.
so the range is [0,infinity)
same as domain.
Ok now on to the next one.
then the range is [0, infinity) ?
Keep in mind most professors don't like decimals. So rewrite domain as [3/5,infinity)
awesome.. thank you! do you think you could stick around and see if you could help me with this other thing I'm stuck on?
its finding the inverse of these functions and I've been stuck on it for hours
Alright if it's quick I will make a new question though and close this one.
Oh that's easy.
so you want me to close this one?
Yes you should.
ok one second.