AP Calculus BC 10.7: Alternating Series Test
Practice AP Calculus BC questions on checking alternating-term conditions and distinguishing absolute, conditional, and divergent series.
- Syllabus
- Effective Fall 2025
- Course
- AP Calculus BC
LIM-7.A—Determine whether a series converges or diverges—Topic 10.7 question 1
[Maximum number: 2]
A function f has derivatives of all orders for -1<x<1. The derivatives of f satisfy the conditions above. The Maclaurin series for f converges to f(x) for |x|<1.
Determine whether the Maclaurin series described in part (a) converges absolutely, converges conditionally, or diverges at x=1. Explain your reasoning.
For x=1, the Maclaurin series becomes ∑n=1∞n(−1)n+1.
The series does not converge absolutely because the harmonic series diverges.
The series alternates with terms that decrease in magnitude to 0, and therefore the series converges conditionally.
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