csat-suneung 2010 Q18

csat-suneung · South-Korea · csat__math-humanities 3 marks Arithmetic Sequences and Series Find Common Difference from Given Conditions
An arithmetic sequence $\left\{ a _ { n } \right\}$ satisfies $a _ { 2 } + a _ { 4 } = 8$ and $a _ { 7 } = 52$. Find the common difference. [3 points]
An arithmetic sequence $\left\{ a _ { n } \right\}$ satisfies $a _ { 2 } + a _ { 4 } = 8$ and $a _ { 7 } = 52$. Find the common difference. [3 points]