Paper 1 · Sequences and Series
⏱ Tested in 1 exam question since 2018
Lesson 9 of 15
Sequences and Series 6: Geometric Sequences 2
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- Prove three terms are geometric by showing T₃/T₂ = T₂/T₁
- Prove a whole sequence is geometric by showing Tₙ₊₁/Tₙ is constant
- Use rules of indices (bⁿ⁺¹ = bⁿ·b) to cancel when simplifying the ratio
- Find x for three geometric terms by cross-multiplying to a quadratic and solving
Most recent exam questions
- 2018 P1 Q2(a)
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