^,R^2-r^2 =50
人气:167 ℃ 时间:2019-10-27 14:22:37
解答
^这符号代表乘方的意思.
R^2-r^2 =50即R²-r² =50
有不明白的地方再问哟,祝你学习进步,更上一层楼! (*^__^*)
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