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Chapter 11: Q29. (page 581)

Find $a_{8}$ if $a_{n} = 4 + 3 n$

Short Answer

Expert verified

The value of $a_{8}$ is28.

Step by step solution

01

Step 1. Given Information.

Given arithmetic sequence is described by $a_{n} = 4 + 3 n$

02

Step 2. Calculation.

Plugging the values in the equation:

$\begin{array}{l} a_{n} = 4 + 3 n \\ a_{8} = 4 + 3 (8) \\ a_{8} = 4 + 24 \\ a_{8} = 28 \end{array}$

03

Step 3. Conclusion.

Hence, $a_{8} = 28$ .

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