M(t)=Mo2^ (-t/30),其中Mo为t=0时铯137的含量,Mo是常数
1个回答
(a^x)'=a^x*lna
[2^(-t/30)]'=2^(-t/30)*ln2*(-t/30)'=-1/30*2^(-t/30)*ln2
Mo是常数我就没写进去
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