求导36(3-x)/(x+3)^3

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求导36(3-x)/(x+3)^3求导36(3-x)/(x+3)^3求导36(3-x)/(x+3)^3[36(3-x)/(x+3)^3]''=36[-1/(x+3)^3-3(3-x)/(x+3)^4]=

求导36(3-x)/(x+3)^3
求导36(3-x)/(x+3)^3

求导36(3-x)/(x+3)^3
[36(3-x)/(x+3)^3]'=36[-1/(x+3)^3-3(3-x)/(x+3)^4]=36{[-x-3-3(3-x)]/(x+3)^4}=72(x-6)/(x+3)^4