1. Find the sum.
n=1∑40 (-2n + 7)
-1120
-1260
-1320
-1360
2. Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.
a = √3; r = √3
a5 = 9 , an = 3n/2
a5= 243, an = 3n
a5= 3 , an = 3n/2-1
3. Find the sum.
n= 1∑10 (3.4n + 8.75)
42.75
192.4
231.75
274.5
4. Find the first term, the common difference, and give a recursive formula for the arithmetic sequence.
10th term is -11; 14th term is -51
a1 = 79, d = 10, an = an-1 + 10
a1 = 79, d = -10, an = an-1 - 10
a1 = 89, d = -10, an = an-1 - 10
a1 = 89, d = 10, an = an-1 + 10
5. Find the indicated term using the given information.
12, 10, 8, ... ; a26
-40
64
-38
62
6. Find the indicated term using the given information.
a11 = 6, a18 = 20; a6
-14
2
-4
-2
7. Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.
a = 4; r = 3π
a5 = 972π5, an = 4 · 3nπn
a5 = 324π4, an = 4 · 3n-1πn-1
a5 = 4 + 12π, an = 4 + 3π(n-1)
a5 = 324π, an = 4 · 3n-1π
8. Find the first term, the common difference, and give a recursive formula for the arithmetic sequence.
9th term is -68; 15th term is -122
a1 = 4, d = 9, an = an-1 + 9
a1 = 4, d = -9, an = an-1 - 9
a1 = 13, d = -9, an = an-1 - 9
a1 = 13, d = 9, an = an-1 + 9
9. Find the nth term and the indicated term of the arithmetic sequence whose initial term, a, and common difference, d, are given.
a = -3; d = 3
an = ?; a10 = ?
an = -6 + 3n; a10 = 24
an = -3 + 3n; a10 = 24
an = -6 + 3n; a10 = 36
10. Find the indicated term of the sequence.
The ninth term of the arithmetic sequence 24, 19, 14, ...
-21
64
-16
-40
11. Find the nth term and the indicated term of the arithmetic sequence whose initial
a = 4; d = -7
an = ?; a16 = ?
an = 11 - 7n; a16 = -101
an = 11 - 7n; a16 = -52
an = 11 + 7n; a16 = -101
an = 4 - 7n; a16 = -101
12. Find the first term, the common difference, and give a recursive formula for the arithmetic sequence.
6th term is -10; 15th term is -46
a1 = 10, d = -4, an = an-1 - 4
a1 = -30, d = 4, an = an-1 + 4
a1 = 10, d = 4, an = an-1 + 4
a1 = -10, d = -4, an = an-1 - 4
13. A local civic theater has 22 seats in the first row and 21 rows in all. Each successive row contains 3 additional seats. How many seats are in the civic theater?
1070 seats
790 seats
1092 seats
1010 seats
14. Find the first term, the common difference, and give a recursive formula for the arithmetic sequence.
7th term is 4; 13th term is 16
a1 = -8, d = 2, an = an-1 + 2
a1= -8, d = 2, an = an-1 - 2
a1= -10, d = 2, an = an-1 + 2
a1 = -10, d = 2, an = an-1 - 2
15. Find the sum.
-3 + 1 + 5 + 9 + 13 + ... + (4n - 7)
n(4n + 7)
n(2n + 5)
n(2n - 5)
n(4n - 7)
16. Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.
a = -6; r = -2
a5 = -96; an= -6 · (-2)n
a5 = -96; an= -6 · (-2)n-1
a5 = 48; an= -6 · (-2)n-1
a5 = 48; an = -6 · (-2)n
17. Find the indicated term using the given information.
a16 = 88, a13 = 73; a1
5
23
18
13
• Annuities or Lump Sums?
In this discussion, please answer the following question and post your response to the discussion board. Please keep in mind, in order to remain eligible for full credit in the discussion, you must, in addition to your initial reply, respond to at least two of your classmates' or instructor's posts.
You have just won a 300 million dollar Power Ball jackpot. Based on your individual state and federal taxes, which option (annuity or lump sum) do you think better and why?
Be sure to research both options before posting your opinion on which is financially more rewarding.