题目
幂级数 sum_(n=1)^infty (2n-1)/(2^n) x^2n-2 的收敛区间为____.A. (-infty, +infty)B. (-1, 1)C. (-2, 2)D. (-sqrt(2), sqrt(2))
幂级数 $\sum_{n=1}^{\infty} \frac{2n-1}{2^n} x^{2n-2}$ 的收敛区间为____.
A. $(-\infty, +\infty)$
B. $(-1, 1)$
C. $(-2, 2)$
D. $(-\sqrt{2}, \sqrt{2})$
题目解答
答案
D. $(-\sqrt{2}, \sqrt{2})$