csat-suneung 2017 Q15

csat-suneung · South-Korea · csat__math-humanities 4 marks Arithmetic Sequences and Series Find Specific Term from Given Conditions
An arithmetic sequence $\left\{ a _ { n } \right\}$ with positive common difference satisfies the following conditions. What is the value of $a _ { 2 }$? [4 points] (가) $a _ { 6 } + a _ { 8 } = 0$ (나) $\left| a _ { 6 } \right| = \left| a _ { 7 } \right| + 3$
(1) - 15
(2) - 13
(3) - 11
(4) - 9
(5) - 7 
An arithmetic sequence $\left\{ a _ { n } \right\}$ with positive common difference satisfies the following conditions. What is the value of $a _ { 2 }$? [4 points]\\
(가) $a _ { 6 } + a _ { 8 } = 0$\\
(나) $\left| a _ { 6 } \right| = \left| a _ { 7 } \right| + 3$\\
(1) - 15\\
(2) - 13\\
(3) - 11\\
(4) - 9\\
(5) - 7
Paper Questions
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