April 5th, 2017, 12:20 AM  #11  
Senior Member Joined: Aug 2012 Posts: 1,919 Thanks: 533  Quote:
So if the anything is $x  1$, we must have $x  1 \geq 0$ which implies $x \geq 1$. Does that make sense?  
April 5th, 2017, 07:09 AM  #12  
Senior Member Joined: Feb 2016 From: seattle Posts: 377 Thanks: 10  Quote:
and of course if I don't make senses it's just because my knowledge and understanding is not there yet or if it is I just don't yet possibly get the connection yet.  
April 5th, 2017, 08:44 AM  #13  
Senior Member Joined: Aug 2012 Posts: 1,919 Thanks: 533  Quote:
 
April 5th, 2017, 12:55 PM  #14 
Senior Member Joined: Feb 2016 From: seattle Posts: 377 Thanks: 10  
April 5th, 2017, 01:00 PM  #15  
Senior Member Joined: Aug 2012 Posts: 1,919 Thanks: 533  Quote:
The question was, do you know what is the domain of the square root function? We're given a function and we need to find its domain. So, * Do you know what a function is? * Do you know what the domain of a function is? If those aren't clear let's talk about them.  
April 5th, 2017, 01:27 PM  #16 
Senior Member Joined: Feb 2016 From: seattle Posts: 377 Thanks: 10 
oh boo sorry, I think a function has been explained to me as the input to a output, yet I always only look at it has what we replace x with or what we move to where X is. I think the domain of the function is our x 
April 5th, 2017, 01:55 PM  #17 
Senior Member Joined: Aug 2012 Posts: 1,919 Thanks: 533  Ok. Then what is the domain of the square root function? What real numbers $x$ can you legally input to $\sqrt{x}$?

April 5th, 2017, 02:51 PM  #18 
Senior Member Joined: Feb 2016 From: seattle Posts: 377 Thanks: 10  
April 5th, 2017, 02:57 PM  #19  
Senior Member Joined: Aug 2012 Posts: 1,919 Thanks: 533  Quote:
What happens when we put 4 into the square root function? What comes out? How about if we input 1? How about 0? How about 1? Four questions, requires four answers. Bearing in mind that we are living in the real numbers.  
April 5th, 2017, 04:01 PM  #20 
Senior Member Joined: Feb 2016 From: seattle Posts: 377 Thanks: 10  Okay thanks if I did it right looks like it has to be zero or a positive number and can't be negative.


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domain, interval, notation, set, state 
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