How do you find the domain of #f(x) = (x+7)/(x^2-4)#?
1 Answer
May 8, 2018
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 values that x cannot be.
#"solve "x^2-4=0rArrx^2=4#
#rArrx=-2,x=2larrcolor(red)"excluded values"#
#rArr"domain "(-oo,-2)uu(-2,2)uu(2,oo)#
graph{(x+7)/(x^2-4) [-10, 10, -5, 5]}
