GCSE Maths Practice: sequences

Question 9 of 12

This question tests the Fibonacci sequence rule.

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\( \text{Which rule describes the sequence: } 1,1,2,3,5,8,...? \)

Choose one option:

\( u_n = u_{n - 1} + u_{n - 2} \) \( u_n = u_{n - 1} + 1 \) \( u_n = 2n \) \( u_n = 2^n \)

Check pattern: sum of previous two numbers gives next term.

Fibonacci: each term = sum of two previous terms, starting 1,1.

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