Here are the first four terms of a number sequence.
2, 3, 5, k k\,k
The rule to continue the sequence is multiply the previous term by 2 and then subtract 1
Work out the 5th term of this sequence in terms of kkk.
208 exam-style questions on Eduqas GCSE Maths Sequences (Nth Term). Each one has a worked solution and a mark scheme showing where the marks go.