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

driliwra7

driliwra7

Answered question

2022-09-14

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

Answer & Explanation

Kimberly Evans

Kimberly Evans

Beginner2022-09-15Added 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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