SOLUTION: please help me solve this challenge question on arithmetic sequences: if the 9th term of an arithmetic sequence is 27 and the 25th term is 123 what is the first term of the sequenc
Algebra.Com
Question 522593: please help me solve this challenge question on arithmetic sequences: if the 9th term of an arithmetic sequence is 27 and the 25th term is 123 what is the first term of the sequence
Answer by Maths68(1474) (Show Source): You can put this solution on YOUR website!
nth term formula of an arithmetic sequence =
Substitute the values in nth term formula
....................(1)
and
Substitute the values in nth term formula
...................(2)
Subtract (1) from (2)
-----------------
Plug in the value of d in (1)
First term of the given sequence is -21
RELATED QUESTIONS
Please help me in solving this arithmetic sequence.: The 21st term of the arithmetic... (answered by htmentor)
The first term of an arithmetic sequence is 5 and the 11th term is 65. Find the 9th... (answered by ewatrrr)
The second term of an arithmetic sequence is 18 and the 9th term is 46. Find the first... (answered by stanbon)
The linear function is an arithmetic sequence. The exponential function is related to the (answered by venugopalramana)
Please help me with this problem:
The 15th term of an arithmetic sequence is 74, and the (answered by stanbon)
if the 3rd term of an arithmetic sequence is 13 and the 9th term is 37,
what is the... (answered by Edwin McCravy)
Hello,can anyone help me with these series and sequences questions? I have a test on them (answered by stanbon)
the fourth term in an arithmetic sequence is 18 and the 9th term is 43. write the... (answered by richwmiller)
Find the 9th term of the arithmetic sequence... (answered by Alan3354)