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hefed


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Answered
solve函数使用问题。
第一种形式里,不含未知参数 a、b (或者说,你已经人为将参数a、b 换成了具体的数值) 第二种形式里,虽然你在 solve之前已经将参数 a、b 赋值了,但由于你的方程是 string 形式,参数值不会自动代入方程里,所以,你可以等方程求解出后,得到的...

3 years ago | 0

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