[題目] 問普物
課本上有個Yukawa potentail energy function
U(r)=-(R0/R)U0e^(-R/R0)
要問F(r)
我是想說用對r微分 ..
可是答案是
-(U0/R)(1+R0/R)e^(-R/R0)
有點不太懂 .. 請問要怎麼解阿 Q_Q
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