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Amanda [17]
4 years ago
6

7, 16, 25, 34, 43, ..... nth term is

Mathematics
2 answers:
pogonyaev4 years ago
8 0

Answer:

79 is the ninth term.

Step-by-step explanation:

You add nine to each one.

7, 16, 25, 34, 43, 52, 61, 70, 79

79 is the ninth term.

zimovet [89]4 years ago
4 0

\bf 7~~,~~\stackrel{7+9}{16}~~,~~\stackrel{16+9}{25}~~,~~\stackrel{25+9}{34}~~,~~\stackrel{34+9}{43}


so, as we can see, we're really adding 9 to the current term, to get the next term, therefore, 9 is the common difference, and of course 7 is the first term.


\bf n^{th}\textit{ term of an arithmetic sequence}\\\\a_n=a_1+(n-1)d\qquad\begin{cases}n=n^{th}\ term\\a_1=\textit{first term's value}\\d=\textit{common difference}\\[-0.5em]\hrulefill\\d=9\\a_1=7\end{cases}\\\\\\a_n=7+(n-1)9

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