#6 only

PROBLEMS In problems 1 - 6, rewrite each sum using sigma notation starting with k = 1. 1 . 1 +2+ 3 + 4 + 3 + ... 2. 1 +4 +9+ 16 +25 + ... 3+6 +9 + 12 + 15 + 18 + ... 4. sin(1) + sin(8) + sin(27) + sin(64) + sin(125) + ... 5 . ( - 2 ) + ( 4 ) + ( - 8 ) + ( 16 ) + ( - 32 ) + ... 6 . ( - 3 ) + ( 9 ) + ( - 27 ) + ( 81 ) + ( - 243 ) + ... In problems 7 - 14, calculate and graph the first four partial sums s to s4 of the given series an n=1 7. E n2 8. S ( - 1 )n 9. En+2 n=1 n=1 n=1 10. 5 { n - mil } 11. 00 1 E on 12. S ( - 2) n=1 n=1 n=1 In problems 13 - 18, the first five partial sums s, to ss are given. Find the first four terms aj to a4 of the series. 13. $1 = 3 , $2= 2, $3 =4 , 84 =5, 85 =3 14. $1 = 3 , 5