Posted by haifeng on 2020-12-22 09:31:38 last update 2020-12-22 09:31:38 | Answers (3) | 收藏
P. 310 习题 7.3
1. 求下列幂级数的收敛域.
(3) $x+\dfrac{4}{2!}x^2+\dfrac{9}{3!}x^3+\dfrac{16}{4!}x^4+\cdots$
(7) $\sum\limits_{n=0}^{\infty}\dfrac{(-4)^n}{n+1}x^{2n+1}$
3. 利用幂级数的性质求下列幂级数的和函数.
(4) $\sum\limits_{n=1}^{\infty}nx^{n+1}$
