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[求助]
matlab編寫二重積分
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syms x t E=1 dbD=580*(E).^0.5 c1=(x.^4.*exp(x)./(exp(x)-1).^2) y=dbD./t u=int(9*kB*(t/dbD)^3*int(c1,0.00001,y),300,T) 總是提示:Warning: Explicit integral could not be found. 請問這是怎么回事 |
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