Question

Domain interval notation f(x) = 3x / x-6?

Answer 1

`(-oo,6)uu(6,oo)`

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-6=0rArrx=6larrcolor(red)"excluded value"`

`rArr"domain "(-oo,6)uu(6,oo)`
graph{(3x)/(x-6) [-20, 20, -10, 10]}