How do you find the domain of #f(x) = (x^2 - 1)/( x +4)#?
1 Answer
Nov 14, 2017
Explanation:
#"the denominator of "f(x)" cannot be zero as this would"#
#"make "f(x)" undefined"#
#"equating the denominator to zero and solving gives"#
#"the value that x cannot be"#
#"solve "x+4=0rArrx=-4larrcolor(red)"excluded value"#
#"domain is "x inRR,x!=-4#
