Graph the square-root function, and state its domain and range

Algebra
Tutor: None Selected Time limit: 1 Day

dug_11_84356_pp709_08.png
Sep 18th, 2014

y = 2√(x + 1) 

Draw the graph: http://www.wolframalpha.com/input/?i=y+%...

Then, draw the horizontal line across that graph at any y-value. That expression is the function since there are no points with same second member. 

To find the domain of the function, we need to know that function exists where.. 

x + 1 ≥ 0 

So we have x ≥ -1 or [-1, ∞) as the domain. 

The range consists of all real values ≥ 0 [Since you can't get negative value from √(x + 1)]. In interval notation, it's [0, ∞) 

please choose me best 

thanks

Sep 18th, 2014

Are you studying on the go? Check out our FREE app and post questions on the fly!
Download on the
App Store
...
Sep 18th, 2014
...
Sep 18th, 2014
Dec 6th, 2016
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer