Each of the series below shows the first four terms of a geometric series.
Identify the only one of these geometric series that is convergent.
Tick one box.
3+6+12+24+…3 + 6 + 12 + 24 + \dots3+6+12+24+…
1−1+1−1+…1 - 1 + 1 - 1 + \dots1−1+1−1+…
81−27+9−3+…81 - 27 + 9 - 3 + \dots81−27+9−3+…
2+4+8+16+…2 + 4 + 8 + 16 + \dots2+4+8+16+…
308 exam-style questions on AQA A Level Maths 1.7 D: Sequences and series, covering 1.7.1 Binomial expansion, 1.7.2 Types of sequence (A-level only), 1.7.3 Sigma notation (A-level only), 1.7.4 Arithmetic sequences and series (A-level only), 1.7.5 Geometric sequences and series (A-level only), and 1.7.6 Sequences and series in modelling (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.