Question

Which equation describes a relationship such that x = 1 must be excluded from the domain?

y = 1/1-x

y = 2 + x

y = √x

y = x^ (x+1)

Answer 1

First choice

Explanation:

The domain refers to all possible values that could be plugged into the function.

The first choice,
`(1)/(1-x)`, will not be valid for the value
`x=1` because when
`x` is 1 the denominator becomes zero.

Division by zero will produce an undefined result, which would be represented by an asymptote when graphing the function.