z = f (x,y,...,t),
x,y,...,t - , ().
z , ..
(*)
z = x + y +...+ t,
z = k1x + k2y +...+knt,
k1,k2,kn - ,
1. , h=d. tgn, d=100.0 , n=4 30', md=0.5 , mn=1'.
.
1.
dh/dd = tgn, dh/dv=d/cos2n.
2. (*)
2. , 36 12 1 .
.
P = a . b.
(dP/da)=b,
dP/db=a, ma=mb=ma,b,
2
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