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Given this arithmetic sequence, what is a18 18,14,10
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Given this arithmetic sequence, what is a18 18,14,10

User Tillerino
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a_1=18 \\ a_2=14 \\ d=a_2-a_1=14-18=-4 \\ \\ a_n=a_1+d(n-1) \\\\ a_(18)=18+(-4)(18-1) \\ {} \ \ \ \ =18-68 \\ {} \ \ \ \ \boxed{=-50}
User Ganzolo
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