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How to Work out the nth term in the sequences below?
http://s1274.beta.photobucket.com/user/hmp311/media/7778AD32326148EBBA9D119F07AA70C8100400000419CAFB720A_zpsaf8eeb58.jpg.html?sort=3&o=0
Note: I keep asking this and I get a formula:
nth term = dn + (a  d)
 one year ago
 one year ago
How to Work out the nth term in the sequences below? http://s1274.beta.photobucket.com/user/hmp311/media/7778AD32326148EBBA9D119F07AA70C8100400000419CAFB720A_zpsaf8eeb58.jpg.html?sort=3&o=0 Note: I keep asking this and I get a formula: nth term = dn + (a  d)
 one year ago
 one year ago

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helpmeplz311Best ResponseYou've already chosen the best response.1
@lgbasallote @nincompoop
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
what exactly are you asking?
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
I dont undersyand how to create a formula.
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
The worksheet is at the link above.
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
i see many sequences
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
It says you have to work out the terms asked for, create a formula.
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
Actually,all of them. I uave to turn this in today.
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
well...the formula for arithmetic sequence is what you say \[\huge a_n = a_1 + (n1)d\] where: an is the last term a1 is the first term n is the number of terms d is the common difference
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
Please know I am in eight grade.
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
for example 1, 9, 17, 25, 33,... find the 50th term an would be a50 because a50 is the last term a1 will be 1 because it's the first term n would be 50 because you're looking for the 50th term so you have 50 terms d would be 8 because it adds 8 each number (1 + 8 = 9; 9 + 8 = 17; etc) so if you substitute.. \[\huge a_{50} = 1 + (50  1)8\] \[\huge a_{50} = 1 + 49 (8)\] \[\huge a_{50 } = 1 + 392\] \[\huge a_{50} = 393\] so the 50th term is 393 in my example
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
if you're old enough to learn sequences then you're old enough to learn this
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
From my homework.
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
ill write in othere first amd then type it on here.
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
number 7 is looking for the 50th term not the 44th
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
You said a1 was the last term,which in this case is 44
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
i think you're confused... 8, 17, 26, 35, 44, .... this doesn't mean 44 is the last term "..." means the sequence continues 8, 17, 26, 35, 44, 53, 62, 71 and so on
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
that means the last term is the 50th term because that's what you're looking for make sense?
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
well, if we erased the 44, would it be correct?
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
nope. you used 5 as your n
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
like i said, the sequence doesn't stop at 44 so there are more than 5 terms
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
since you're looking for the 50th term, there would be 50 terms make sense?
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
good. so rewrite your solution
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
wait it shouldve been 50 right
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
right. now solve it
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
thatll give me the 50th term?
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
do you solve for a in the a50?
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
no... a50 means \(a _{50}\) that means 50th term
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
just solve the right side
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
umm,let me tru again
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
ooo the a50 doesnt matter when solving
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
i lost connection
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
you solved 8 + (501)9 right?
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
did you use a calculator?
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
yes i was supposed to use order of operations?
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
i see what you did (8 + 50  1)* 9
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
you have to do (50 1) then multiply it to 9 then add 8
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
PEMDAS PARENTHESIS expoent MULTIPLICATION division ADDITION subtraction did you forget this?
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
no, thats what order of operations is
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
parenthesis is (50  1) multiplication is (501)*9 addition is 8 + (501)*9
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
that means you do 50  1 first
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
o. so, i use that formula, substitute,and solve right side?
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
i hope im not in trouble @amistre64
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
finally got to the end of it :) howdy!
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
you mean the end of my endless question?
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
i havent seen the links yet, but lgbas stuff looks good so far yeah, these things can get rather lengthy, but thats the way we like to see them. lots of interaction and studying instead of rote answers
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
lol, not that i can see :) as long as your trying to learn that material you are fine
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
they all look to be arithmetic progressions, so you can apply the same techniques to all of them
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
i'd like to know though @amistre64 do you know what dn + (ad) means?
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
it looks like the formula for arithmetic progression....but it looks weird
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
its another way to express the sequence but for n starting at 0 i believe
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
amistre can i fan u
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.2
dn looks really weird
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
dn + (ad) dn  d + a d(n1) + a
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
you can fan whomever you wish
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
i think if i get anymore fans the site will collapse into an infinitly large black hole tho so be careful if you do :)
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
have you gone over how to find the terms used: a, d, n ?
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
good, cause one you know how to get those, the rest is just simple arithmetic
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
*cause once you know
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
d common difference
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
how do you find the common difference of the sequence?
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
right, subtract the first term from the second term problem 10: 7 ,13, 19, ... d = 137 = 6 right?
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
and what does the "a" in the formula refer to?
 one year ago

helpmeplz311Best ResponseYou've already chosen the best response.1
a refers to a term
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
yes, but there is "a" special a that we need to use in the formula itself. the FIRST term. In the problem im working thru, that would be: 7 d=6, a=7 and what does "n" mean?
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
im going to use a different but equal notation for the formula: \[f(n)=a+d(n1)\] \[f(n)=7+6(n1)\]
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
you can replace \(f(n)\) with \(a_n\) if you want, its just a placeholder
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
the "n" is reserved for the position of the term we want to find. in this case, the 90th term \[f(n)=7+6(n1)\] \[f(90)=7+6(901)\] \[f(90)=7+6(89)\] \[f(90)=7+534\] \[f(90)=541\]
 one year ago
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