Posted by **TTR+S<3** on Friday, May 2, 2014 at 3:36pm.

Determine whether each sequence is arithmetic or geometric. Find the next three terms.

1.

14, 19, 24, 29, . . . (1 point)

geometric, 34, 39, 44

arithmetic, 32, 36, 41

arithmetic, 34, 39, 44 ***

The sequence is neither geometric nor arithmetic.

2.

–4, 8, –16, 32, . . . (1 point)

arithmetic, 64, 128, 256

geometric, –64, 128, –256 ***

geometric, –48, 64, –80

The sequence is neither geometric nor arithmetic.

3.

81, 27, 9, 3, . . . (1 point)

arithmetic, 0, –3, –6

geometric, 0, –3, –6

geometric, 1, one-third, one-ninth***

The sequence is neither geometric nor arithmetic.

4. What are the first four terms of an arithmetic sequence if the common difference is 1.5 and the first term is 15? (1 point)

a. 15, 30, 45, 60

b. 15, 16.5, 18, 19.5***

c. 15, 22.5, 33.75, 50.625

d. none of the above

5. What are the first four terms of a geometric sequence if the common ratio is 10 and the first term is 4.5? (1 point)

a. 4.5, .45, .045, .0045

b. 4.5, 9.0, 13.5, 18.0

c. 4.5, 14.5, 24.5, 34.5

d. none of the above

i dunno if #5 is a. or d.

pls help asap!!!!!

thanx in advance

- Ms. Sue? Steve? Reiny? Damon? anyone pls? -
**TTR+S<3**, Friday, May 2, 2014 at 3:47pm
sorry to be sooooo impatient

- math -
**Steve**, Friday, May 2, 2014 at 3:53pm
#1-4 all ok

#5. What's the trouble? Start with 4.5 and start multiplying by 10's. (D) since you get

4.5 45 450 4500 ...

(a) is common ratio of 0.1

- math -
**TTR+S<3**, Friday, May 2, 2014 at 3:58pm
ok, i wasn't sure, for a second i thought it was a.

thanks Steve!:)

- math -
**Kuai**, Friday, May 2, 2014 at 4:17pm
All correct except 5

#5 is d

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