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September 18, 2014

September 18, 2014

Posted by **lee** on Sunday, February 3, 2013 at 8:52pm.

1. Generate the first five terms in the sequence using the explicit formula.

yn = 5n 5

30, 25, 20, 15, 10

30, 25, 20, 15, 10

10, 15, 20, 25, 30(my answer)

10, 15, 20, 25, 30

2. What is the 15th term in the sequence using the given formula?

cn = 3n 1

14

57

44

44(my choice)

3. Write a recursive formula for the sequence 7, 13, 19, 25, 31, ... Then find the next term.

an = an 1 + 6, where a1 = 7; 37(my choice)

an = an 1 + 6, where a1 = 37; 7

an = an 1 6, where a1 = 6; 23

an = an 1 6, where a1 = 7; 8

4. Write a recursive formula for the sequence 7, 4, 1, 2, 5, .... Then find the next term.

an = an1 3, where a1 = 8; 7

an = an1 3, where a1 = 7; 8(my answer)

an = an1 + 3, where a1 = 3; 22

an = an1 + 3, where a1 = 7; 8

5. Write an explicit formula for the sequence 8, 6, 4, 2, 0, ... Then find a14.

an = 2n + 10; 16

an = 2n + 8; 18

an = 2n + 8; 20

an = 2n + 10; 18

Dont understand this problem.

- algebra -
**Reiny**, Sunday, February 3, 2013 at 11:13pmyour first four are correct

#5.

In the explicit formula, you can find any term directly , unlike a recursive, where you have to know the previous term

so if n = 1, we should get 8 from the formula

look at the first and last

the both give you

a(1) = -2(1) = 10 = 8

a(14) = -2(14) + 10 = -28+10= -18

so it has to be the last one.

- algebra -
**a**, Friday, February 8, 2013 at 5:26pmMultiple Choice

1. Generate the first five terms in the sequence using the explicit formula.

yn = 5n 5 (1 point)

(0 pts) 30, 25, 20, 15, 10

(0 pts) 30, 25, 20, 15, 10

(1 pt) 10, 15, 20, 25, 30

(0 pts) 10, 15, 20, 25, 30

1 /1 point

2. What is the 15th term in the sequence using the given formula?

cn = 3n 1 (1 point)

(0 pts) 14

(0 pts) 57

(1 pt) 44

(0 pts) 44

0 /1 point

3. Write a recursive formula for the sequence 7, 13, 19, 25, 31, ... Then find the next term. (1 point)

(1 pt) an = an 1 + 6, where a1 = 7; 37

(0 pts) an = an 1 + 6, where a1 = 37; 7

(0 pts) an = an 1 6, where a1 = 6; 23

(0 pts) an = an 1 6, where a1 = 7; 8

1 /1 point

4. Write a recursive formula for the sequence 7, 4, 1, 2, 5, .... Then find the next term. (1 point)

(0 pts) an = an1 3, where a1 = 8; 7

(1 pt) an = an1 3, where a1 = 7; 8

(0 pts) an = an1 + 3, where a1 = 3; 22

(0 pts) an = an1 + 3, where a1 = 7; 8

1 /1 point

5. Write an explicit formula for the sequence 8, 6, 4, 2, 0, ... Then find a14. (1 point)

(0 pts) an = 2n + 10; 16

(0 pts) an = 2n + 8; 18

(0 pts) an = 2n + 8; 20

(1 pt) an = 2n + 10; 18

1 /1 point

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