0 Edit. Identify correct interval notation for each set. Equations and inequalities are mathematical sentences formed by relating 2 expressions to each other. < < x Hence the required interval notation for the given inequalities is (-∞, 5) After having gone through the stuff given above, we hope that the students would have understood, how to represent an inequality in interval notation. c Let's see how to be precise about this in each of three popular methods: 1. ] {\displaystyle [-3,\infty )}, 2) Here we can solve each inequality individually, and x has to satisfy both inequalities. Example 4: Graph and give the interval notation equivalent: x<3 or x≥−1. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. We use the following symbols for interval notation: We use the symbols (  ) and  [   ] in interval notation.