📝 题目
1. 3.1 (2) ${x}_{n} = \frac{1}{{2}^{n}};\;\left( 3\right) {x}_{n} = \frac{n}{n + 1}$ .
💡 答案与解析
1. 3.1 (2) ${x}_{n} = \frac{1}{{2}^{n}};\;\left( 3\right) {x}_{n} = \frac{n}{n + 1}$ .
1. 3.1 (2) ${x}_{n} = \frac{1}{{2}^{n}};\;\left( 3\right) {x}_{n} = \frac{n}{n + 1}$ .
1. 3.1 (2) ${x}_{n} = \frac{1}{{2}^{n}};\;\left( 3\right) {x}_{n} = \frac{n}{n + 1}$ .