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27-02-2018
Mathematics

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Given this arithmetic sequence, what is a7? 2,4,6,8

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Banabanana Banabanana

27-02-2018

[tex]a_1=2 \\ a_2=4 \\ d=a_2-a_1=4-2=2 \\ \\ a_n=a_1+d(n-1) \\ a_7=2+2(7-1) \\ {} \ \ \ =2+12 \\ {} \ \ \ \boxed{=14} [/tex]

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