Question

Write the inequation that represent the interval and state whether the interval is bounded or unbounded.
`(- ∞,∞)`

Answer 1

`(- ∞,∞)`
Here, x takes values between `–∞`  and `∞`
∴ the required inequation is `–∞ < "x" < ∞`
∴ it is an unbounded (open) interval.