AP Precalculus
AP Precalc Unit 2A (2.1–2.6): Basic Solving + Conceptual FRQ
Shared by Ashton · Nov 2, 2026 · 0 plays
Warm-up FRQs for the Unit 2A AP Readiness test (2.1–2.6): sequence formulas, linear vs exponential tables, a depreciation model, residual basics. Rubric and sample answer for every part.
12 questions across 4 sections. Write your answer, then check it against the rubric and score yourself.
Sample questions
Open an item to see its answer.
(a) Write an explicit formula for aₙ and find a₁₀.
Sample answer: aₙ = 4 + 6(n − 1). a₁₀ = 4 + 54 = 58.
(b) Write an explicit formula for gₙ and find g₆.
Sample answer: gₙ = 5(2)^(n−1). g₆ = 5(2)⁵ = 160.
(c) Explain the difference between how arithmetic and geometric sequences change.
Sample answer: An arithmetic sequence adds the same amount (6) each term. A geometric sequence multiplies by the same factor (2) each term.
(a) Is f linear or exponential? Is g linear or exponential? Justify each.
Sample answer: f doubles each step (constant ratio 2), so it's exponential. g goes up by 4 each step (constant difference), so it's linear.
(b) Write an equation for f and for g.
Sample answer: f(x) = 3(2)ˣ and g(x) = 3 + 4x.