Exam tips
Point 7 of 8 — Lesson 2 – Geometric Sequences, Series and ApplicationsQuestion bank: 29 questions (29 with pictures)
08 Exam tips
- In a geometric sequence, Tn = a r^(n-1) and each term is multiplied by r.
- The sum to infinity Sinf = a / (1 - r) is strictly valid only when |r| < 1.
- The geometric mean between a and b is ±√(a × b).
- Compound interest, population growth, and radioactive half-life are physical models of geometric sequences.
- Sn = a(1 - rn) / (1 - r) for r ≠ 1.
📝 Question bank for this point
29 questions linked to this point only, 29 of them with pictures.