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syms a b y(t)
dsolve(diff(y) == a*y, y(0) == b)
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ans =
b*exp(a*t)

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¶¨ÒåÒ»¸öеÄÊý×ét_numerical = 0:0.01:1
y_numerical = b*exp(a*t_numerical);

plot(t_numerical, y_numerical)
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>> dsolve('Ds=3*(40+5*(s-7+4*t))^(3/2)/s^2-4','s(0)=a','t')
Warning: Explicit solution could not be found.
> In dsolve at 101

ans =

[ empty sym ]

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