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Use differential equations in models (#580)
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Use differential equations in models (#580)
Solve
d
y
d
t
=
k
y
\frac{dy}{dt} = ky
d
t
d
y
=
k
y
to get
y
=
y
0
e
k
t
y = y_0 e^{kt}
y
=
y
0
e
k
t
.
