# Thread: "domais of the letter"

1. ## "domais of the letter"

Hi guys im new to the forum got here linked by an UK friend, im having this problem atm, im not understand what they are asking me to do in the questions, maybe i post an example here:

For the functions given by the fallowing expressions, determine the natural domains, the derivatives, and the domains of the latter.

example: 1/ x * sqr x^2 + 1

i hope this is right section.

2. Hi

Do you mean $\frac{1}{x} \:\sqrt{x^2+1}$ ?

3. Originally Posted by running-gag
Hi

Do you mean $\frac{1}{x} \:\sqrt{x^2+1}$ ?
no i mean 1 divided by all the others (x * sqrt x^2 +1)

im sry i dont know how to use this math coding

4. OK so it is $\frac{1}{x\:\sqrt{x^2+1}}$

The domain is where both conditions are fulfilled :
$\sqrt{x^2+1}$ is defined
and
$x\:\sqrt{x^2+1}$ is different from 0

5. Originally Posted by running-gag
OK so it is $\frac{1}{x\:\sqrt{x^2+1}}$

The domain is where both conditions are fulfilled :
$\sqrt{x^2+1}$ is defined
and
$x\:\sqrt{x^2+1}$ is different from 0
my french friend if u dont mind going into more details

what is the natural domain of the function?
what is the derivative of the function?
what are the domains if the latter?

please if u could answer does answeres to that function i will be very thankfull to u

6. Originally Posted by zl4y3r
my french friend if u dont mind going into more details

what is the natural domain of the function?
what is the derivative of the function?
what are the domains if the latter?

please if u could answer does answeres to that function i will be very thankfull to u
Exercises are made to practice, otherwise you will never improve.
If this exercise is given to you this means that you studied the relevant chapters.
Show me what you have already done.
Where are you blocked ?

7. Originally Posted by running-gag
Exercises are made to practice, otherwise you will never improve.
If this exercise is given to you this means that you studied the relevant chapters.
Show me what you have already done.
Where are you blocked ?
ofc i studied all of this, im studying them atm also, the problem is im not understanding the question what they want from me ;(

ok if u dont belive me could u just answer me whats the difference between "determine the natural domain" and "the domains of the latter"

plz plz

8. "The domain of the latter" refer to the domains of the derivatives I suppose

9. Originally Posted by running-gag
"The domain of the latter" refer to the domains of the derivatives I suppose
ok then i thank u