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Problem
What is the probability of a radioactive nucleus to survive one mean life? a.
1
e
\frac{1}{e}
e
1
b.
1
e
+
1
\frac{1}{e+1}
e
+
1
1
c.
1
−
1
e
1 - \frac{1}{e}
1
−
e
1
d.
1
e
−
1
\frac{1}{e} - 1
e
1
−
1
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