View Full Version : What is the pattern in this sequence?
ak47num1
Jun 30th, 2006, 06:50 PM
I am just wondering what is the pattern in the following sequence. Thanks.
0.5, 1, 2, 4, 16, ...
lip1978
Jun 30th, 2006, 06:57 PM
It's a typo and there's an 8 between 4 and 16 :)
Gordon
Jun 30th, 2006, 06:58 PM
sub it into the formula...
It's a typo and there's an 8 between 4 and 16 :)
yeah.
The geometric diffrence is 2.
Tn = AR^(n-1)
Sn=A(r^n-1)/(r-1)
ak47num1
Jun 30th, 2006, 07:00 PM
Sorry, but sub it into what formula?
I am also thinking it is a typo.
Gordon
Jun 30th, 2006, 07:01 PM
up top.
A= .5
r = 2
Mems
Jun 30th, 2006, 07:01 PM
Sub it into the Tn formula. Are you taking this in Grade 11 Math perchance?
-Mems
blexann
Jun 30th, 2006, 07:02 PM
I am just wondering what is the pattern in the following sequence. Thanks.
0.5, 1, 2, 4, 16, ...
just wondering ?
Gordon
Jun 30th, 2006, 07:03 PM
just wondering ?
There is none,
When, the pattern changes after the 4. There should be a 8 in between the 4 and 16 or else it is not a geometric sequence.
ak47num1
Jun 30th, 2006, 07:03 PM
LOL. Alright, I would like to know... not just wondering...
I should be more concise with my wordings.
Subbing into the Tn formula did not work for me.
ak47num1
Jun 30th, 2006, 07:04 PM
Yes. It seems that there is no pattern in this sequence.
ZenOps
Jun 30th, 2006, 07:05 PM
Blue, no no, wait, yellow, ARghhhhh!
Gordon
Jun 30th, 2006, 07:06 PM
If it was a word problem they did not give you enough information, your missing n.
So you cant solve it as a geometric formula.
If they give you the last term or the amount of terms then you would be able to use the formula. If not then forget it. Cause theres obvesouly a mistake from 4 to 16.
Should be a 8 in between. So theres no pattern in this question.
P__S__2
Jun 30th, 2006, 07:09 PM
Multiply by 2? lol
Gordon
Jun 30th, 2006, 07:38 PM
Multiply by 2? lol
Yeah I said that already, but then the pattern isnt right there cause its missing a 8 inbetween 4 and 16.
sxz
Jun 30th, 2006, 07:41 PM
Sub it into the Tn formula. Are you taking this in Grade 11 Math perchance?
-Mems
I think most (if not all) high schools have finished for the summer now. :cheesygri
sonick
Jun 30th, 2006, 07:54 PM
D.y.o.f.h.w.
kgen
Jun 30th, 2006, 08:08 PM
I think there are too few numbers given to find an accurate recurrence; that said, are the following numbers 128, 4096, 1048576, ... :?:
ak47num1
Jun 30th, 2006, 10:32 PM
Sorry, but the question is to find the next 2 terms in that sequence. I highly suspect that the question is wrong.
Thanks to all who answered.
blexann
Jul 2nd, 2006, 02:58 PM
There is none,
When, the pattern changes after the 4. There should be a 8 in between the 4 and 16 or else it is not a geometric sequence.
what???