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## write the domian and range

Write the domain and range of the function in interval notation.

f(x)= square root sign then x - 4

Choose the domain of the function?

Whats the range of the function?

Hi David;
f(x)=√(x-4)

We already know that a negative number cannot be square rooted.
Therefore, to understand the minimum value of the domain...
0=x-4
4=x

Domain; 4≤x
Range; 0≤y

Hi the answers that I have to pick form are

for the domain

(0,infinity sign)
[-4 infinity sign)
[4,infinity sign)
(4,infinity sign)

for the range

(4,infinity sign)
[-4,infinity sign)
[0,infinity sign)
(0,infinity sign)

Hi Again;
You have to select between brackets and parenthesis.

A few weeks ago, I needed help with this too.  Fellow tutor Michael F. of Wilton, CT, rescued me.  It is only a coincidence that we both live in Connecticut.  According to him,
"the parentheses ( and ) indicate no endpoints."
I am quoting out of context.  But if I understand correctly, the ( ) means that the endpoint next to the ( or ) is NOT included.  If I understand that correctly, then the [ ] are what is required here because
Domain; 4≤x
Range; 0≤y
It is EQUAL or greater than.
I cannot e-mail another tutor.  You can.