OpenStudy (anonymous):

f(x)=4log(x+2)-3 find the domain, x and y intercepts, and inverse

4 years ago
OpenStudy (terenzreignz):

What could go inside a log?

4 years ago
OpenStudy (anonymous):

is it log base 10?

4 years ago
OpenStudy (terenzreignz):

I don't know, is it? I'd assume so :P

4 years ago
OpenStudy (anonymous):

how would i find the domain for this?

4 years ago
OpenStudy (terenzreignz):

at the moment, it doesn't really matter what log base it is... but what can go inside a log?

4 years ago
OpenStudy (anonymous):

the exponent? i literally have no idea...sorry :(

4 years ago
OpenStudy (terenzreignz):

log can only take positive values...

4 years ago
OpenStudy (anonymous):

oh! okay so the domain is all positive values then! thank you!

4 years ago
OpenStudy (terenzreignz):

no!

4 years ago
OpenStudy (anonymous):

is it x=all positive values?

4 years ago
OpenStudy (terenzreignz):

No... because it's log(x+2) and not log(x)

4 years ago
OpenStudy (anonymous):

gotcha...then what would the domain be?

4 years ago
OpenStudy (terenzreignz):

Well, for one thing, x+2 should be positive

4 years ago
OpenStudy (anonymous):

i'm so confused, what does the +2 have to do with the overall domain?

4 years ago
OpenStudy (terenzreignz):

Well, if it was log(x) we can't have x = -1 right?

4 years ago
OpenStudy (anonymous):

yes...so would the domain be all positive numbers above 2?

4 years ago
OpenStudy (terenzreignz):

No...

4 years ago
OpenStudy (anonymous):

well, if you solved (x+2)=0, x would be -2, but logs have to be positive...

4 years ago
OpenStudy (terenzreignz):

You mean x+2 > 0

4 years ago
OpenStudy (anonymous):

why is it greater than zero, the equation says equals...

4 years ago
OpenStudy (terenzreignz):

You need a review... big time :3

4 years ago
OpenStudy (anonymous):

that is true, i haven't done this since november haha. thanks for trying to help, i'll probably just ask my teacher

4 years ago