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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Kimberly Evans

Answered 2022-09-15
Author has **13** answers

Let $\left({x}_{n}\right)=(9,15,21,27,.......)$ 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 ${x}_{n}=a+(n-1)d$

$\therefore {x}_{25}=9+(24-1)\cdot 6$

$=147$

The common difference is $d={x}_{n+1}-{x}_{n}=6$

The first term is a=9.

The general term is given by ${x}_{n}=a+(n-1)d$

$\therefore {x}_{25}=9+(24-1)\cdot 6$

$=147$

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