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Q17.

Expert-verifiedFound in: Page 523

Book edition
Student Edition

Author(s)
Carter, Cuevas, Day, Holiday, Luchin

Pages
801 pages

ISBN
9780078884801

**Find the next three terms of each arithmetic sequence****.**

**$2,10,18,26,\mathrm{...}$**

The next three terms of the given arithmetic sequence are **34, 42 and 50**.

The given arithmetic sequence is: $2,10,18,26,\mathrm{...}$

From the given arithmetic sequence, it can be noticed that the first, second, third and fourth terms of the arithmetic sequence are 2, 10, 18 and 26 respectively.

The common difference of the arithmetic sequence is the difference between the succeeding term and its preceding term.

Therefore, the common difference $\left(d\right)$ of the given arithmetic sequence is:

$d=10-2\phantom{\rule{0ex}{0ex}}=8$

Therefore, the first term and the common difference of the given arithmetic sequence are 2 and 8 respectively.

The $n\mathrm{th}$ term $\left({a}_{n}\right)$ of the given arithmetic sequence is given by:

${a}_{n}={a}_{1}+\left(n-1\right)d$, where ${a}_{1}$ is the first term and $d$ is the common difference.

The next three terms of the given arithmetic sequence are fifth, sixth and seventh terms.

Therefore, the next three terms of the given arithmetic sequence having ${a}_{1}=2$ and $d=8$ are:

${a}_{5}={a}_{1}+\left(5-1\right)d$

$=2+\left(4\right)\left(8\right)\phantom{\rule{0ex}{0ex}}=2+32\phantom{\rule{0ex}{0ex}}=34$

${a}_{6}={a}_{1}+\left(6-1\right)d$

$=2+\left(5\right)\left(8\right)\phantom{\rule{0ex}{0ex}}=2+40\phantom{\rule{0ex}{0ex}}=42$

${a}_{7}={a}_{1}+\left(7-1\right)d$

$=2+\left(6\right)\left(8\right)\phantom{\rule{0ex}{0ex}}=2+48\phantom{\rule{0ex}{0ex}}=50$

Therefore, the next three terms of the given arithmetic sequence are 34, 42 and 50.

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