An arithmetic sequence is given by 6, 13, 20, … Given that  a_n = 1434, find the value of n.

CIn an arithmetic sequence, the fifth term is 44 and the ninth term is 80. Find the sum of the first 50 terms of the sequence.

Find the four arithmetic means between 16 and 91.

Find the 4th arithmetic mean:  -8 ___ , ___, ___, ___, ___, 10

Find the first three terms of an arithmetic series in which a_1= 9, a_n = 105,and S_n = 741

Find the sum  where d = 5 ;  n = 16,  a_n =72

Find the sum  where  a_1= 40 ;  n = 20,  d = -3

Find the first five terms of each arithmetic series described: a_n = 36,  n = 8, S_n= 120

Fill in the blank: If the arithmetic mean between 𝑎 and 𝑏 is 9 and the arithmetic mean between 7𝑎 and 5𝑏 is 15, then 𝑏 − 𝑎 = ______.

Given that  " t "  is the arithmetic mean of  "s " and " u ", write an expression in terms of  " t "   that is equal to  s + u.

Find the sum  given the arithmetic sequence  x , 44 , y , 64 , z 

Find the arithmetic mean between 𝑎_8 and 𝑎_11 for the arithmetic sequence 𝑎=3𝑛−12 

The sum of the  first 12 terms of an arithmetic series is  168. The sum of the first  30 terms is 1500 . Find  the first three terms?