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feixiaolin: ÊýѧEPI+1, http://emuch.net/bbs/viewthread.php?tid=9452448&fpage=1 EPI 2015-10-03 07:52:43
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>> syms a
>> dsolve('D2y +Dy/t+ a*y=0')
ans =
C1*besselj(0,a^(1/2)*t)+C2*bessely(0,a^(1/2)*t)
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