1. C1 Sequences and series

2. Write down the first 4 terms of the sequence u n+1 =u n +6, u 1 =6 6, 12, 18, 24

3. Write down the first 4 terms of the sequence u n+1 =u n -5, u 1 =2 2, -3, -8, -13

4. Write down the first 4 terms of the sequence u n+1 =6-u n, u 1 =2 2, 4, 2, 4

5. Write down the first 4 terms of the sequence u n+1 =4u n -3, u 1 =1 1, 1, 1, 1

6. Write down the first 4 terms of the sequence u n+1 =3u n + 2, u 1 =3 3, 11, 35, 107

7. Write down the first 4 terms of the sequence u n+1 = 1 u n u 1 =2 2, ½, 2, ½

8. Write down the terms in each series and then find the sum 4 2r+1 r=1 3 + 5 + 7 + 9 = 24

9. Write down the terms in each series and then find the sum 3 4r-3 r=1 1 + 5 + 9 = 15

10. Write down the terms in each series and then find the sum 4 r 2 r=2 4 + 9 + 16 = 29

11. Write down the terms in each series and then find the sum 4 r-3 r=1 -2 + -1 + 0 + 1 = -2

12. Write down the terms in each series and then find the sum 5 r(r-1) r=2 2 + 6 + 12 + 20 = 40

13. Write down the terms in each series and then find the sum 4 1 r=1 r 1 + ½ + + ¼ = 2 1 12

14. Write down the terms in each series and then find the sum 3 6 r=1 6 + 6 + 6 = 18

15. Write down the terms in each series and then find the sum 4 (-1) r 2r r=1 -2 + 4 + -6 + 8 = 4

16. Write down the terms in each series and then find the sum 6 (-1) r r 2 r=2 4 + -9 + 16 + -25 + 36 = 22