find domain and range of f(x)=square root ofx2-25

 F(x)=square root of X2 -25, Since it is in square root, thus for solution to be real, X2 > 25 ( square root of negative no. is complex)

X2 > 25, x>5 and x<-5. So domain= (-infinity,-5] U [5,infinity).      Since squareroot of positive no. is always positive, thus Range= [0,infinity)

Hope this helps you. plz let me know if this was correct answer !

  • 18

Yes this is de correct ans.thanks a lot!!!!!.

  • 1
What are you looking for?