December 16th, 2010, 08:03 AM  #1 
Newbie Joined: Nov 2010 Posts: 26 Thanks: 0  Domain !
find the domain 1\ root(4x^33x^2x) 2\root(x^2+3x4) × root ( 2xx^2) 3\ root(x^2+3x4)\root(x2)^2 
December 16th, 2010, 08:16 AM  #2  
Newbie Joined: Dec 2010 Posts: 26 Thanks: 0  Re: Domain ! Quote:
 
December 16th, 2010, 08:24 AM  #3  
Newbie Joined: Nov 2010 Posts: 26 Thanks: 0  Re: Domain ! Quote:
 
December 16th, 2010, 08:26 AM  #4  
Newbie Joined: Dec 2010 Posts: 26 Thanks: 0  Re: Domain !
[quote=ahmedar] Quote:
Yes. (1) 4x^33x^2x>=0 Can you solve this? The solutions are the domain of this function. Do the same to the rest and take the intersection of the solutions.  
December 16th, 2010, 08:32 AM  #5 
Newbie Joined: Nov 2010 Posts: 26 Thanks: 0  Re: Domain !
i know how to solve but how to write the domain i will find more then one answer of x 
December 16th, 2010, 08:41 AM  #6  
Newbie Joined: Dec 2010 Posts: 26 Thanks: 0  Re: Domain ! Quote:
If you were to write it in solution sets, {x: x>a or x<b for x is all reals}. I am sure you can google this or refer to the examples in your textbook.  
December 16th, 2010, 08:56 AM  #7  
Newbie Joined: Nov 2010 Posts: 26 Thanks: 0  Re: Domain ! Quote:
 
December 16th, 2010, 09:00 AM  #8  
Newbie Joined: Dec 2010 Posts: 26 Thanks: 0  Re: Domain !
[quote=ahmedar] Quote:
Lets say the domain is x>3. You can write, (1) The domain is (3 , infinity) (2) The domain is x>3, (3) {x>3 , } These are the few ways of representing a domain. Is this what you are asking?  
December 16th, 2010, 09:14 AM  #9 
Newbie Joined: Nov 2010 Posts: 26 Thanks: 0  Re: Domain !
thanks and what about if i got more than one value of x? for example in first question i will get x(4x+1)(x1)>=0 so what will be the answer ? 
December 16th, 2010, 09:19 AM  #10  
Newbie Joined: Dec 2010 Posts: 26 Thanks: 0  Re: Domain ! Quote:
 

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