4.1 級数の定義

1.

(a) $\displaystyle{\frac{10}{3}}$ (b) $\displaystyle{\frac{5}{6}}$ (c) $\displaystyle{-\frac{3}{2}}$

2.

(a) $\displaystyle{\frac{10}{7}}$ (b) $\displaystyle{\frac{159}{59}}$ (c) $\displaystyle{1}$