Question

a) The 1" term of a sequence is given by 2n + 1. Write down the first four terms of the sequence. ) The first four terms of another sequence are 1, 7, 17, 31. (1) By comparing this sequence with the sequence in (a), write down, in terms of n, a formula for the ni" term of the sequence, un (ii) Hence, find the 388 term. ​

Answer 1

Answer:

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Answer 2

Hint : Use the formula (a+b)n