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helpmeplz311
 3 years 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)
helpmeplz311
 3 years 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)

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helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1@lgbasallote @nincompoop

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2what exactly are you asking?

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1I dont undersyand how to create a formula.

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1The worksheet is at the link above.

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2i see many sequences

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1It says you have to work out the terms asked for, create a formula.

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1Actually,all of them. I uave to turn this in today.

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2well...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

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1Please know I am in eight grade.

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2for 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

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2if you're old enough to learn sequences then you're old enough to learn this

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1ill write in othere first amd then type it on here.

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2number 7 is looking for the 50th term not the 44th

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1You said a1 was the last term,which in this case is 44

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2i 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

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

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1well, if we erased the 44, would it be correct?

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2nope. you used 5 as your n

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

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2since you're looking for the 50th term, there would be 50 terms make sense?

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2good. so rewrite your solution

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1wait it shouldve been 50 right

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2right. now solve it

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1thatll give me the 50th term?

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1do you solve for a in the a50?

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2no... a50 means \(a _{50}\) that means 50th term

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2just solve the right side

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1umm,let me tru again

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1ooo the a50 doesnt matter when solving

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2you solved 8 + (501)9 right?

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2did you use a calculator?

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1yes i was supposed to use order of operations?

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2i see what you did (8 + 50  1)* 9

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2you have to do (50 1) then multiply it to 9 then add 8

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2PEMDAS PARENTHESIS expoent MULTIPLICATION division ADDITION subtraction did you forget this?

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1no, thats what order of operations is

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2parenthesis is (50  1) multiplication is (501)*9 addition is 8 + (501)*9

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2that means you do 50  1 first

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1o. so, i use that formula, substitute,and solve right side?

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2i hope im not in trouble @amistre64

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0finally got to the end of it :) howdy!

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1you mean the end of my endless question?

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0i 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

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0lol, not that i can see :) as long as your trying to learn that material you are fine

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0they all look to be arithmetic progressions, so you can apply the same techniques to all of them

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

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2it looks like the formula for arithmetic progression....but it looks weird

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0its another way to express the sequence but for n starting at 0 i believe

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1amistre can i fan u

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.2dn looks really weird

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0dn + (ad) dn  d + a d(n1) + a

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0you can fan whomever you wish

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0i think if i get anymore fans the site will collapse into an infinitly large black hole tho so be careful if you do :)

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0have you gone over how to find the terms used: a, d, n ?

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0good, cause one you know how to get those, the rest is just simple arithmetic

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1d common difference

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0how do you find the common difference of the sequence?

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0right, subtract the first term from the second term problem 10: 7 ,13, 19, ... d = 137 = 6 right?

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0and what does the "a" in the formula refer to?

helpmeplz311
 3 years ago
Best ResponseYou've already chosen the best response.1a refers to a term

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0yes, 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?

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0im going to use a different but equal notation for the formula: \[f(n)=a+d(n1)\] \[f(n)=7+6(n1)\]

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0you can replace \(f(n)\) with \(a_n\) if you want, its just a placeholder

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0the "n" is reserved for the position of the term we want to find. in this case, the 90th term \[f(n)=7+6(n1)\] \[f(90)=7+6(901)\] \[f(90)=7+6(89)\] \[f(90)=7+534\] \[f(90)=541\]
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