Question

5 terms in sequence 5,16,31,50,73 find and expression for nth term

Answer 1

Explanation:

Each term is 11 + (n-2) * 4 more than the previous term

`a_(n)` =
`a_(n-1)` + 11 + (n-2)*4 a1 = 5

which can be re-written:

`a_(n)` =
`a_(n-1)` + 3 + 4n and a1 = 5 <======answer