Interval Notation Math Example 3

Follow the full solution, then compare it with the other examples linked below.

Example 3

easy
Write x≤7x \leq 7 in interval notation.

Solution

  1. 1
    All numbers up to and including 7: (−∞,7](-\infty, 7].
  2. 2
    Use bracket at 7 (≤\leq), parenthesis at −∞-\infty.

Answer

(−∞,7](-\infty, 7]
When there is no lower bound, use −∞-\infty with a parenthesis.

About Interval Notation

A shorthand for writing all real numbers in a range, using parentheses for excluded endpoints and square brackets for included endpoints.

Learn more about Interval Notation →

More Interval Notation Examples

Example 1 easy

Write [formula] in interval notation.

Example 2 medium

Write [formula] in interval notation.

Example 4 medium

Convert the interval [formula] to inequality notation.

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