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2022-09-06

Write an equation for the nth term of the arithmetic sequence: -3, -5, -7, -9, ...

Ricky Lamb

Beginner2022-09-07Added 7 answers

The formula for an arithmetic sequence is ${a}_{n}={a}_{1}+(n-1)d$

where $a}_{1$ is the first term and d is the difference between terms.

In this case ${a}_{1}=-3$ and d=−2

${a}_{n}=-3+(n-1)(-2)=-3-2n+2=-2n-1$

${a}_{n}=-2n-1$

where $a}_{1$ is the first term and d is the difference between terms.

In this case ${a}_{1}=-3$ and d=−2

${a}_{n}=-3+(n-1)(-2)=-3-2n+2=-2n-1$

${a}_{n}=-2n-1$

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