How do you find the domain of #f( x ) = \frac { 3x } { 2x + 9}#?
1 Answer
May 25, 2017
Explanation:
#"the domain is all real values of x except values that make "#
#"the denominator "color(blue)"undefined"#
#"to find excluded values, equate the denominator to zero"#
#"and solve. This gives values that x cannot be"#
#"solve " 2x+9=0rArrx=-9/2larrcolor(red)" excluded value"#
#"domain is " x inRR,x!=-9/2#
