求微分方程的通解.
解:对应齐次微分方程的特征方程为
特征根为
齐次方程的通解为
设原方程的特解为代入原方程可得
因此
故原方程的通解为
(为任意常数).
Goods are carried by several of transport--on road or rail, by sea or air.
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
2002年新配方口服补液盐(ORS)溶液的张力是
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