Question

What is the range of the function `f(x) =1 / x`?

Answer 1

`y inRR,y!=0`

Explanation:

`y=1/x`

`"express the function with x as the subject"`

`xy=1rArrx=1/y`

`"the denominator cannot be zero as this would make"`
`"x undefined"`

`rArry=0larrcolor(red)"excluded value"`

`rArr"range is "y inRR,y!=0`