What is the domain and range of # y =sqrt (x^2 - 9)#?
1 Answer
Mar 18, 2018
Explanation:
#"for the domain we require"#
#x^2-9>=0#
#rArrx^2>=9#
#rArrx<=-3" or "x>=3#
#"domain is "(-oo,-3]uu[3,+oo)#
#"range is "y inRR,y>=0#
graph{sqrt(x^2-9) [-10, 10, -5, 5]}
