来自董朝文的问题
【“△”这个符号在数学中,是啥意思啊?具体代表什么?】
“△”这个符号在数学中,是啥意思啊?具体代表什么?
1回答
2020-04-24 16:12
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罗玉雄
1.三角形S△=.
2.变量△T=T2-T1
3.方程根数判别公式△=b^2-4ac
2020-04-24 16:15:46
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