The first three terms of a Fibonacci-type sequence are 𝑥, 𝑥 + 7 and 2𝑥 + 7. Work out an expression for the 4th term. The 𝑛th pattern has 2𝑛 + 1 sticks. Write the number of sticks ...

Save guides, add subjects and pick up where you left off with your BBC account. Number sequences are sets of numbers that follow a pattern or a rule. Each number in a sequence is called a term.