Unit 1Topic 1.3Question BankHL

Mathematics: Analysis and Approaches · Unit 1: Number and Algebra

Geometric sequences and series

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8

Questions

53

Total marks

Question 1 of 86 marks

Finite geometric sequences and series

[Maximum mark: 6]In a geometric sequence $u_1 = \frac{1}{64}$ and $u_4 = 1$ (a) Find the common ratio, $r$ [3](b) Find the sum of the first $5$ terms of the sequence. Give your answer correct to $2$ decimal places.[3]