高数(同济)下册知识点总结.pdf

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xz2.XJlim•3,K¡T4••¼êf(x;y)3:(x0;y0)éx
x!0
x0ê,P•fx(x0;y0)0
xzf(x0+
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x!0
x
x!0
xdx0
yzf(x0;y0+
y)f(x0;y0)df(x0;y)Ónfy(x0;y0)=lim=lim=j

2、y=y0
y!0
y
y!0
ydy3.XJ
z=f(x+x0;y+y0)f(x0;y0)=A
x+B
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7、^†‹IXOŽ•È©(4)

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9、^†‹IXOŽn•È©(k˜!k˜)(4)

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11、^5ORŽxd=x
S(3

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