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AP Calculus BC 10.2 Geometric Series Overview

Identify a geometric series, test its common ratio for convergence and calculate its infinite sum when it exists, including series written in shifted form.

Syllabus
Effective Fall 2025
Course
AP Calculus BC

Exam points

  • identify the governing calculus relationship in the problem
  • justify the result with symbolic, graphical or contextual evidence

10.2 Working with Geometric Series question 1

[Maximum number: 1]

4. If n=1bn\sum_{n=1}^{\infty} b_{n} is a geometric series of all-positive terms with b1=90b_{1}=90 and b3b_{3}=10, then n=1bn\sum_{n=1}^{\infty} b_{n}

A

diverges

B

=105

C

=135

D

converges to a sum that cannot be determined

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