<p>若二次函数<img src="https://learnfile.20230611.cn/learnAppQuestion/fa/92/fa921be89d419959bbc6b0493fb015b5.png" style="width: 100%;height: auto;">的最小值为<img src="https://learnfile.20230611.cn/learnAppQuestion/b9/68/b968f283697c24c317059beb5f28d919.png" s