Question

Given that f(x) =2x - 3 / x + 1 state the value of x where f(x)is undefined ​

Answer 1

x = - 1

Explanation:

Given

f(x) =
`(2x-3)/(x+1)`

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 + 1 = 0 ⇒ x = - 1 ← excluded value

Answer 2

It’s undefined at x=-1 because the denominator would be 0