
PreCalculus PreCalculus Math Forum 
 LinkBack  Thread Tools  Display Modes 
March 26th, 2017, 06:22 AM  #1 
Newbie Joined: Aug 2016 From: Brasil Posts: 17 Thanks: 0 
1) Determine the domain of the following function: Answer: Domain [4,4] That is the answer of the exercise, but I wanted to know how to get that result. I could not understand. Last edited by skipjack; March 26th, 2017 at 07:02 AM. 
March 26th, 2017, 06:52 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 17,150 Thanks: 1282 
For the function to be real, √(25  x²) $\small\geqslant$ 3, so 25  x² $\small\geqslant$ 9. That's equivalent to x² $\small\leqslant$ 16, which means that the domain is [4, 4]. 
March 26th, 2017, 07:25 AM  #3 
Newbie Joined: Aug 2016 From: Brasil Posts: 17 Thanks: 0 
thank very much my friend!!! Awesome!!


Tags 
domain, function, simple 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Domain of a function  Mifarni14  PreCalculus  1  October 9th, 2016 09:46 AM 
Domain of this function  bounce  Algebra  2  November 25th, 2013 12:05 AM 
domain of a function  rhta  Algebra  4  October 29th, 2009 06:30 PM 
Domain of sin function! Please help !  letzdiscuss  Algebra  6  September 19th, 2009 05:21 PM 
domain of this function  remeday86  Calculus  1  March 16th, 2009 05:00 PM 