We give an improvement on a character sum estimate in ${\mathbb{F}}_q[t]$ and answer a question of Shparlinski.

中文翻译：

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有关功能字段中字符总和的注释

我们对的字符总和估计进行了改进 ${\mathbb{F}}_q[Ť]$ 并回答Shparlinski的问题。