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# StudySquare

# AQA A-level Maths Introduction to sequences

This page covers the following topics:

1. Series

A series is the sum of the terms of a sequence up to its nth term. It is denoted by Sn and is expressed as:

# 1

What is the term of the sequence Un = 5n β 2 given by the expression ββ·β Un β ββΆβ Un?

# 2

Given the sequence Un = 2n, is the series Sβ = 2 + 4 + 6 + 8 β 10 + 12 a series for the sequence Un?

# 3

What is the sum of the first 5 terms of the sequence Un = 7n β 3?

# 4

Adam eats 5 apples in a week, 3 apples the next and 1 apple the week after. How many apples has Adam eaten in the past 3 weeks?

# 5

What basic operation does β perform?

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