Module 2 · Algebra
Chapter 26: Harmonic Progression
Algebra
2 topics
What this chapter covers
The 2 topics below make up Harmonic Progression on the CAT. Work through them in order — each one builds toward the SAT-style questions in this chapter's bank.
1HP Basics
2AM-GM-HM Relationship
Study material & tests
📚 Concept notes
Worked explanations & SAT examples for every topic above.
Coming soon
🎯 Topic practice
SAT-style questions by topic, with full solutions.
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📝 Chapter test
Timed, mixed-difficulty test with instant analysis.
Coming soon
Formula Reference Sheet
CAT reference
🖩 Graphing Calculator