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red_and_black_4life_... | Need Help with Math Homework? (Algebra 2)? |
I need to determine which of the following sequences are arithmetic.
1. 9,5,1,-3...
2. 3,-6,12,-24...
3. 1,4,7,10...
4. 1,3/4,5/3,2,7/3 |
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Neodiogenes
|
Arithmetic sequences are if you add the same number each time to get the next number in the sequence. So in this case #1 is arithmetic:
9 + -4 is 5,
5 + -4 is 1,
1 + -4 is -3,
and so on.
Multiplicative sequences are when you multiply by the same number each time to get the next. So #2 is:
3 * -2 is -6,
-6 * -2 is 12,
12 * -2 is 24,
and so on.
I'll leave the other two for you to figure out. :)
by the way I think you copied over #4 incorrectly. The second number in the sequence should be 4/3 not 3/4 ... and you might want to take the advice from other people answering here with a huge grain of salt. Some of them seem to be giving you wrong answers to deliberately mess you up. Always check for yourself |
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thale138
|
id say 1 and 3 are sequences, im too lazy to do the math with fractions. http://www.ltcconline.net/greenl/Courses/103B/seqSeries/ARITSEQ.HTM this link might help |
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GambitX94
|
I would say #3. |
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mks 7-15-02
|
GO ASK YOUR PARENTS. |
|

gwenwifar
 |
1 - yes
(from each term to the next you are adding -4)
2 - no.
(it's a geometric sequence, you're multiplying by -2)
3 - yes
(you're adding 3)
4 - no/yes
(if you did copy the one fraction incorrectly, then yes. you're adding 1/3 every time. if the fractions are correct, then no) |
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lilrere
 |
im in algebra 1 too |
|

jenjf5678
 |
1. subtracts 4 each time
2. all multiplied by -2. 3 x -2 = -6, -6 x -2 = 12, 12 x -2 = -24
3. add 3 each time
4. Not sure. I hate fractions. |
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JAZZYJUICE
 |
get a tutor! |
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psydi
 |
#1
But you should ask for help from your teacher if you don't get it! |
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Beast from the East
 |
1. Arithmetic (-4)
2. Geometric (times-2)
3. Arithmetic (+3)
4. Geometric |
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Mr.Nice
|
Don't ask me, I'm in Algebra 1 |
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???
 |
get a tutor im in algerbra 1 |
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