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arithmetic sequence

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An arithmetic sequence 2017-07-17
abbi pose la question :
hi there im a student in 11 grade

ive been trying to do this task but i have no idea how to do it the question is
Find the common difference and the n^th term of the arithmetic sequence if the first term is 4 and the twentieth sum of the terms is 1030

Penny Nom lui répond.
Which term of this sequence has value 8? 2016-07-20
Lauren pose la question :
Hi there

Which term in the sequence -2; -5/3; -4/3 ; -1; ... has a value of 8.

Since term 2 and 3 of this sequence contain fractions which can be converted to recurring decimals. What is the best way to work out the common difference here.

I do however understand that to work out the nth term of an arithmetic series, the following formula Tn = a + (n-1)d. In this series a = -2

Penny Nom lui répond.
A sequence 2016-01-05
Mia pose la question :
the next three terms in each sequence. 0.4, 0.54, 0.68, 0.82,
Penny Nom lui répond.
The sum of the first 50 terms of an arithmetic progression 2014-07-26
Joshua pose la question :
Hello ...my is Joshua...I'm a grade 11 student...I got a question

Calculate the sum of the first 50 terms of an arithmetic progression: 112:98:84

Penny Nom lui répond.
9,-4,6,-8,3,... 2014-03-31
Alynna pose la question :
You are given the following pattern: 9,-4,6,-8,3,...
Create a formula for the nth figure.

I have trouble finding the formula, I need help trying to find it.

Penny Nom lui répond.
An arithmetic sequence 2014-03-20
Xabiso pose la question :
The 10th term of an arithmetic sequence is 28 and the 7th term is 19. Calculate the common difference and the first term of the sequence.
Penny Nom lui répond.
An arithmetic sequence 2014-01-06
paris pose la question :
find the twenty-fifth term of an arithmetic sequence whose first term is 12 and whose common difference is -6
Penny Nom lui répond.
An arithmetic progression 2012-08-22
A student pose la question :
the 3rd term of an A.PPP is 10 more than the first term while the 5th term is 15 more than the second.find the sum of the 8th and 15th terms if the 7th term is 7 times the first term.
Penny Nom lui répond.
Three consecutive terms of an arithmetic sequence 2011-10-30
Juliette pose la question :
Find X when x, 1/2x + 7, 3x -1 are consecutive terms of an arithmetic sequence.
Penny Nom lui répond.
4 + 10 + · · · + (6n − 2) 2010-04-21
Lan pose la question :
Find the sum 4 + 10 + · · · + (6n − 2). The answer is 3(n^2) + n. How?
Penny Nom lui répond.
How many terms are there in this sequence? 2009-09-28
tabby pose la question :
How many terms are there in this sequence?
5,1,-3,...,-111

Penny Nom lui répond.
The middle term of an arithmetic sequence 2008-12-15
Leigh pose la question :
Find the sum of the first fifteen terms of an arithmetic series if the middle term is 92
Penny Nom lui répond.
How many terms in this sequence? 2007-06-11
Jesse pose la question :
How do I find how many terms are in the sequence? 51, 48, 45, ...., -75
Stephen La Rocque and Penny Nom lui répond.
Arithmetic Series 2007-02-18
Krista pose la question :
Question- The sum of the first 4 terms of an arithmetic series is -8 and the sum of the first 5 terms is 500. Determine the sum of the 3 terms.
Stephen La Rocque lui répond.
5,8,11,14,17 2007-01-18
Mairead pose la question :
the sequence i was given was 5,8,11,14,17 what is the nth term and what is the 10th term ?
Paul Betts lui répond.
The sum of 2000 consecutive integers is 1000 2006-10-29
Matias pose la question :
if the sum of 2000 consecutive integers is 1000, then the sum digits of the greatest of these 2000 integers is?
Penny Nom lui répond.
Arithmetic and Geometric Sequences 2006-04-19
Skye pose la question :
If the 1st, 4th, and 8th terms of an arithmetic sequence are consecutive terms in a geometric sequence, find the common ratio of the geometric sequence.
Stephen La Rocque lui répond.
An Arithmetic sequence 2005-12-01
Aana pose la question :

The first term in an arihmetic series is 25 and the 3rd term is 19. Find the number of terms in the series if its is 82.

Here's what I did to find d
a+2d=19; 25+2d= 19 ;19-25=2d d=-6/2=-3

This is where I'm stuck. Can you please provide me with some guidance.


Penny Nom lui répond.
An arithmetic progression 2004-12-24
A student pose la question :
the 4th and 5th term of an arithmetic progration 47 and 52 respactively find
a)d
b)a1
c)a50

Penny Nom lui répond.
The sum of 4,0,-4..., -156 2004-04-28
Christina pose la question :
find the requested sum of the arithmetic sequence

4,0,-4..., -156

Penny Nom lui répond.
Finite differences 2003-02-10
Jenny pose la question :

I need to find a formula that will work with any number.
I am finding the volume of a 3d cross- shape. Here are my results so far:

Term Number      0   1    2    3     4      5
nth term         1    7   25   63   129    231
1rst diff           6   18   38   66     102
2nd diff              12    20   28   36
3rd diff                  8     8    8

I can't seem to find a formula that will work with any number. Any help would be much appreciated.

Penny Nom lui répond.

The sum of the first 1000 even integers 2003-02-06
Jill pose la question :
What is the sum of the first 1000 even integers?
Paul Betts lui répond.
Arithmitic sequence 2003-02-01
A student pose la question :
I am having problems solving this arithmetic sequence... 1, 5, 10, ___, 50, 1.00, ___, 10.00, ... I believe the answers to be 25 and 5.00 but I can't figure why.
Claude Tardif lui répond.
Arithmetic sequences 2001-09-10
Rachel pose la question :
I can't seem to figure out a problem that deals with arithmetic sequencing. This is the question: The 5th term in an arithmetic sequence is 1/2, and the 20th term is 7/8. Find the first three terms of the sequence. I attempted this problem with the formula: An = a + (n-1)d (where the n represents the nth term, a is the first term, and d represents the common difference) I keep getting -9.5 for the first number, and then 3/120 as the common difference between the numbers. But as I have figured it, the sequence is getting greater and greater, and my data does not go with the terms given.
Penny Nom lui répond.
Geometric and arithmetic sequences 2001-01-26
Garry pose la question :
what are the equations for geometric and arithmetic sequences?

also, what are the equations for finding the sums of those series?


Leeanne Boehm and Penny Nom lui répond.
The sum of the squares of 13 consecutive positive integers 2000-08-25
Wallace pose la question :
Prove that it is not possible to have the sum of the squares of 13 consecutive positive integers be a square.
Harley Weston lui répond.
The number of seats in an auditorium 2000-05-16
David Evaska pose la question :
There are 10 students in the first row of seats in an auditorium 12 in the second 14 in the third and 2 additional in each seat. The total number of rows is 40. I know the answer is 1960 can you please show me the formula step by step.
Penny Nom lui répond.
Sequences and series 1998-05-27
Michael Le Francois pose la question :
The sum of the first ten terms of an arithmetic series is 100 and the first term is 1. Find the 10th term.

The common ratio in a certain geometric sequence is r=0.2 and the sum of the first four terms is 1248 find the first term.
Penny Nom lui répond.

 
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