Find 25th term of the arithmetic series 9, 15, 21, …

driliwra7 2022-09-14 Answered
Find 25th term of the arithmetic series 9, 15, 21, …
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Answers (1)

Kimberly Evans
Answered 2022-09-15 Author has 13 answers
Let ( x n ) = ( 9 , 15 , 21 , 27 , ... ... . ) be the arithmetic sequence.
The common difference is d = x n + 1 - x n = 6
The first term is a=9.
The general term is given by x n = a + ( n - 1 ) d
x 25 = 9 + ( 24 - 1 ) 6
= 147
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