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Generalize the pattern by finding a formula to calculate the nth term.

1, 5, 9, 13, 17, 21,...




A)

4n




B)

n + 4



C)

4n - 3



D)

4n + 4

Verified Answer :

naǫ

It's an arithmetic sequence. The first term is 1 and the common difference is 4.

\(a_1=1 \\ d=4 \\ \\ a_n=a_1+d(n-1) \\ a_n=1+4(n-1) \\ a_n=1+4n-4 \\ \boxed{a_n=4n-3} \\ \hbox{answer C}\)

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