This document contains questions on quadratic sequences. You can learn more about quadratic sequences in the entry made on the front page section; Quadratic sequences

### Question 1: Quadratic sequences

- Write down the first 6 terms for the sequences defined by the following quadratic formulae.n
^{th}term = -4n^{2}- 10n^{th}term = n^{2}+ 2n^{th}term = 2n^{2}- 5n^{th}term = -6n^{2}- n - 5n^{th}term = -10n^{2}- 3n - 5n^{th}term = -1n^{2}- 3n - 4

### Question 3: Using differences

- Find the first and second difference for the following sequence
sequence: -3 1 13 33 61 97 First difference: Second difference:

### Question 3: Finding nth term

- Write down the nth term formula for the following sequences.-9,-6,-1,6,15,26,39-4,-1,4,11,20,31-9,-6,-1,6,15,26,393,6,11,18,27,388,11,16,23,3211,14,19,26,359,12,17,24,33-5,-2,3,10,19,30,43-3,0,5,12,21,32-3,0,5,12,21
- Work out an nth term formula for the triangular numbers1, 3, 6, 10, 15, 21