Learn about interval notation in functions with this introductory video from Khan Academy.

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This is equivalent to all x < -a or x>a. Recap: 1. Solve x^2 = a^2. 2. Draw horizontal number line. Draw vertical tick marks on the horizontal line showing x-values satisfying x^2 = a^2. 3. Check each interval and tick mark to see if it satisfies x^2 > a^2. For intervals, set an x equal to a value within that interval. Then plug it back into x ...

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Learn about the domain and range of a function on Khan Academy.

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Learn about the definite integral as the limit of a Riemann sum on Khan Academy.

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A1.A.4.3 Write the equation of the line given its slope and y-intercept, slope and one point, two points, x- and y-intercepts, or a set of data points.

Learn about interval notation with free educational videos from Khan Academy.