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2Â¥: Originally posted by feixiaolin at 2014-10-01 07:59:58
p=y'
p''-2p'+5p=0    p=k1*exp(-(1+2i)t) + k2*exp(-(1-2i)t)
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feixiaolin: ½ð±Ò+5 2014-10-01 10:23:19
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U=(s+a-2)/(s^3-2*s^2+5*s)
=(s+a-2)/{s*[(s-1)^2+2^2]}
=A/s+[B*(s-1)+2*C]/[(s-1)^2+2^2]
=A*1/s+B*(s-1)/[(s-1)^2+2^2]+C*2/[(s-1)^2+2^2]
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