How do I Express the inequality x < 7 using interval notation.

Question

asked Jan 7, 2022 114k views

1 Answer

Jorjon · Answer 1 · 2022-01-14T08:37:46+0000

Answer:
$(-\infty, 7)$

You can write this as (-infinity, 7) if you aren't able to use the infinity symbol.

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Step-by-step explanation:

Think of x < 7 as writing
$-\infty < x < 7$

So x is between negative infinity and 7, excluding both endpoints.

To write
$-\infty < x < 7$ in interval notation, we write
$(-\infty, 7)$

The curved parenthesis tell us to exclude the endpoint.