设幂级数的收敛区间是: A. (-2,2) B. (-2,4) C.

题库总管2019-12-17  18

问题 设幂级数的收敛区间是:A. (-2,2)B. (-2,4)C. (0,4)D. (-4,0)

选项

答案C

解析[img]/upload/tiku/190/2457262_1.jpg[/img]t ≤2收敛,代入得-2
转载请注明原文地址:https://ti.zuoweng.com/ti/kYSNKKKQ