Unit 1 covers limits and continuity: evaluating limits algebraically and graphically, one-sided limits, and the three conditions a function must meet to be continuous at a point. Everything later in AB is defined in terms of a limit.
With only 3 topics, this unit is narrow enough to master completely — an unusual opportunity in a course this size.
100% of the questions come with a figure — a graph, diagram or data display. Reading the figure correctly is most of the work before any content knowledge applies.
Questions per CED topic.
Drawn from the practice pool, not from the mock papers.
The left-hand limit is 1, while the right-hand limit is -1. Since they are unequal, the two-sided limit does not exist.
The graph approaches y=2 from both sides and the filled point is also at y=2, so t is continuous at x=-2.
The left-hand limit is 2, while the right-hand limit is -2. Since they are unequal, the two-sided limit does not exist.
Ten a day at no cost. One account covers SAT, ACT and AP.
Real AP questions with a full explanation on every answer, and a mistake bank that only clears when you get it right.