Question

Is this a geometric sequence: 640, 160, 40, 10, ...?

Answer 1

HInt: a geometric sequence has the smae common ratio

Answer 2

Each term in the sequence is being divided by 4. Therefore, it is.

Answer 3

x,x/a,x/(a^2),x/(a^3), etch

Answer 4

im not the best at math, can you tell me what that means?

Answer 5

640/160=4
160/40=4
40/10=4

Answer 6

Yes, because their common ratio is 0.25. What you do is that you find 160/640, you get .25.
Well, then, you're like, alright, that's cool, but you have to find out if it's constant. Meaning that they can make that last 10 into a 5 and then it would just mess everything up, and it would not be a geo sequence.

Answer 7

Yes, because their common ratio is 0.25. What you do is that you find 160/640, you get .25.
Well, then, you're like, alright, that's cool, but you have to find out if it's constant. Meaning that they can make that last 10 into a 5 and then it would just mess everything up, and it would not be a geo sequence.

Answer 8

You would not REPEAT .......WOULD NOT divide the first # by the second number to find the common ratio, so I strongly recommend that you do not do what bazinga276 did.

Answer 9

Do it the opposite way.

Answer 10

Yeah, my answer isn't the best

Answer 11

lucy, you seem to know what you are doing. Could you help me with a lot of other problems too?

Answer 12

sure. like whhat? I'm working on the same homework, so I can probably answer your questions.

Answer 13

like, finding the nth term in \[a _{1} = 4, n = 5, r = 3\]

Answer 14

like the equation?

Answer 15

in the gemetric sequence

Answer 16

324

Answer 17

do you know how?

Answer 18

no, lol. could you help me figure out how to do it on my own?

Answer 19

ooof, srry i was gone for a while. Just so you know, my comp is not the fastest comp ever, so if you can bear with me, that would be great. Okay, lets start with baby steps. Do you know the geometric sequence formula?

Answer 20

i didnt pay much attention in this chapter.
this is actually makeup work and im trying to learn how to do it. My math teacher isnt the best teacher either. and yea i can bear with you, you seem to be the only one that knows much about this.

Answer 21

haha, okay, great. So if you have your txtbook with you, you should have on there that it is a_n=a_1(r)^n-1

Answer 22

I do have my textbook with me, but i dont see anything on here that looks anything at all like that. lol.

Answer 23

haha, then you must have a diff. one. Anyways, it SHOULD say that, but just usse the formula I gave you. Or if you want to see it in fancy print and everything, it is called the general rule for geometric sequence. U MUST know this formula.

Answer 24

I might know it if i saw it, im not good with the names. I used to be an all a student but i kinda slacked off this year... im not sure why. Just lots of things going on.. But im trying now lol.

Answer 25

What grade are you in?

Answer 26

9th
not the best year to slack off..

Answer 27

And yuo take preap or IB algebra 2?

Answer 28

im in honors algebra 1, but a lot of stuff from algebra 2 got pushed back to algebra 1.

Answer 29

atleast, thats what my schedule says..

Answer 30

haha I'm in eighth grade and I do Algebra 2... I get what you are going throuhg. It's tough to catch up.

Answer 31

We are doing algebra 2 stuff in algebra 1 because it got pushed back to algebra 1.

Answer 32

hmm...so why the make up work?

Answer 33

because, i slacked off.. a lot.. and my teacher likes me enough to let me make up the work i didnt do..

Answer 34

man, how do you DO that? Teach me how to get in good with math teachers!

Answer 35

Just be the quiet one that sits in the back corner behind everyone else and doesnt get into too much trouble. lol.

Answer 36

I dont want to sound like a complete loner tho :/ The back corner is just the easiest place to sleep.

Answer 37

haha, not always the best choice for math, though. as u have already learned, makes you evne MORE slp deprived. Hey, if you have any more questions, can you open a new open question? This is getting hard to load.

Answer 38

Do you have anything else you can get on, where you can help me more privatly? i understand if you cant do that.

Answer 39

um, idk... I have like, 10 minutes until "curfew" and I have 15 freaking questioons left. Procrastinating is NOT the way to go... bleh.

Answer 40

hmm.. https://www.facebook.com/profile.php?id=100000491074105 add me on facebook and i can get back to you later, im good with any other subject so if you need help on anything else, id be glad to help. and you could possibly explain to me how this geometric stuff works.

Answer 41

gah, im not alowed to get on fb on weekdays...

Answer 42

thats got to be horrible..
well I dont use anything else, so i guess i could find you on here. lol .-.

Answer 43

haha, okay, i'll make sure to add you sometime though! Just don't reject me, because I dont take rejection very well...lol

Answer 44

lol, im not gonna reject you when im the one that wanted you to add me. Just tell me what to look for.

Answer 45

Insun Yoon, that's the name. R u who u say u are?

Answer 46

yea, im Ryan Grissett. and i like your name lol, im not sure how to say it tho. .-.