a_n = 3 n + 2

常见问题解答

• 写出前六项 \(a_{n} = 3 n + 2\)

  

  $$5,8,11,14,17,20$$

• 判断该数列是否为等差数列 \(a_{n} = 3 n + 2\)

  

  $$\text{等差数列}$$

• 判断该数列是否为等比数列 \(a_{n} = 3 n + 2\)

  

  $$\text{不是等比数列}$$

• 找出共同点 \(a_{n} = 3 n + 2\)

  

  $$d=3$$

• 找到极限 \(a_{n} = 3 n + 2\)

  

  $$+\infty$$

• 确定收敛或发散 \(a_{n} = 3 n + 2\)

  

  $$\text{发散}$$