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Write a simplified expression for the right half of the equation that can be used to find the nth term in the sequence

Write a simplified expression for the right half of the equation that can be used-example-1

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Answer is;


a_n=3n
\begin{gathered} \text{common difference (d) =6-3=3} \\ By\text{ formula, } \\ a_n=a+(n-1)d\text{ , where a=3} \\ a_n=3+(n-1)3 \\ a_n=3+3n-3 \\ a_n=3n \end{gathered}

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