How do you find the domain of #f(x) = (3x^2)/(x^2-49)#?
1 Answer
May 2, 2017
Explanation:
The denominator of f(x) cannot be zero as this would make f(x)
#color(blue)"undefined".# Equating the denominator to zero and solving gives the values that x cannot be.
#"solve " x^2-49=0rArr(x-7)(x+7)=0#
#rArrx=-7" and " x=7larrcolor(red)" are excluded values"#
#"domain " x inRR,x!=+-7#
