SOLUTION: Hello. Can someone please help me with this series problem. I need to find {{{a[1] }}} and {{{d }}} Given: {{{a[7]=49}}} and {{{a[3] + a[9] = 82 }}} Thank you.

Algebra.Com
Question 937865: Hello.
Can someone please help me with this series problem.
I need to find and
Given:
and
Thank you.
Found 3 solutions by josgarithmetic, MathTherapy, MathLover1:
Answer by josgarithmetic(39629)   (Show Source): You can put this solution on YOUR website!
Symbolism suggests Arithmetic Sequence, with as the first term, a common difference d, and general term .


Use the formula to rewrite your given equations.

and .

Simplify and solve the system.
Answer by MathTherapy(10556)   (Show Source): You can put this solution on YOUR website!

Hello.
Can someone please help me with this series problem.
I need to find and
Given:
and
Thank you.
1st term, or 

Common difference, or       

You can do the check!! 

===================

If you need a complete and detailed solution, let me know!!

Send comments, “thank-yous,” and inquiries to “D” at MathMadEzy@aol.com.

Further help is available, online or in-person, for a fee, obviously. 



For FREE info and answers to questions about the ASVAB exam, the NYS 3 – 8 city/state wide exams,GENERAL

MATH and HOMEWORK QUESTIONS, or MATH QUESTIONS related to the Regents Integrated Algebra, 

Regents Geometry, Regents Algebra 2/Trigonometry, SHSAT, COOP/HSPT/TACHS, PSAT, SAT, ACT, SSAT/ISEE,

GRE, CLEP, and the TASC/GED, you can visit: http://asvabstudyzone.freeforums.net/. 

Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!
 

The  term of an arithmetic sequence is:







where   is the first term in the sequence,  is the common difference between terms  and  is the number of the term to find



given:



 and 



use  to find  and  expressed in terms of  and 



=>   

=> 



=> 



=> 



=> 



=> 





find: 



 and  





 if  we have



 ....substitute  for 

















=> 



=> 



=> 











 

RELATED QUESTIONS


Hello can someone please explain and help me with this problem? Do I have to put the a's... (answered by scott8148)

Can someone please help me with this problem?

Find a1 in a geometric series for which... (answered by Edwin McCravy)

hi sir i got a lottary series question.i am provide some data can you please help me to... (answered by ikleyn)

hi sir i got a lottary series question.i am provide some data can you please help me to... (answered by ikleyn)

can someone help please.
Given f(x)=5x-3 and g(x)=x^2, 
find g((f(2)). 
A. 7? B. 17?... (answered by solver91311,macston)

Hello,

I need to find the answer to this question can someone help me please???... (answered by sudhanshu_kmr)

I need help with this problem I am using 2l+2w but the answer I am getting isn't correct.  (answered by ankor@dixie-net.com)

Hello I need help solving a geometric sequence, I need to find S20 for the series -1 + -3  (answered by ikleyn)

hello, I really need help with a math problem that it has been a challenge to figure out... (answered by lwsshak3)