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dC1(x)/dx=a*C1(x)                                   (1)
dC2(y)/dy=b*C2(y)                                   (2)  
½âµÃ£ºC1(x)=A*e^(a*x)
         C2(y)=B*e^(b*y)
¹Ê f(x,y)=A*B*e^(a*x+b*y)=C*e^(a*x+b*y)
A¡¢B¡¢C¾ùΪÈÎÒâ³£Êý£¬C=A*B ¡£
3Â¥2015-01-22 08:06:55
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