YsabelT291927 YsabelT291927

29-10-2022
Mathematics

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Determine if it is an arithmetic or geometric sequence:72, 48, 24…

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VairaF68897 VairaF68897

29-10-2022

Notice that

[tex]\begin{gathered} 48=72-24 \\ 24=48-24=(72-24)-24=72-2*24 \end{gathered}[/tex]

Therefore, the formula of the sequence is

[tex]a_n=72-24(n-1);n\ge1[/tex]

Thus, it is an arithmetic sequence.

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