, .:
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7.
8.
. , , . , . , , . .
:
1) Y=a*b*c
2) Y=a+b+c
3) Y=a/b
4) Y=(a+b)/c
Y=(a-b)*
:
Y1=a1*b1*c1*d1 Y0=a0*b0*c0*d0
():
Δa% = *100%
Δb% = *100%
Δc% = *100%
Δd% = *100%
a,b,c,d Y
a: ΔY(a) =Y0* *100%
b: ΔY(b) =[(Y0+ ΔY(a)] * *100%
c: ΔY() =[(Y0+ ΔY(a)+ ΔY(b)] * *100%
d: ΔY(d) =[(Y0+ ΔY(a)+ ΔY(b)+ ΔY(c)] * *100%
: ΔY=Y1 Y0 = [ΔY(a)+ΔY(b)+ΔY()+ΔY(d)]
:
, , , . . .
:
Y0=a0*b0 Y1=a1*b1
Y0 Y1 , .
a- b
:
Jy = (Y1/Y0) = ;
ΔY(a) =(Ja-1)*Y0; ΔY(b) =(Jb-1)*Ja*Y0
Ja= ; Jb= ;
: ΔY=Y1 Y0= ΔY(a) + ΔY(b)
: Y= a/(b+c+d)
:
Y1=a1+b1+c1 Y0=a0+b0+c0
:
a: ΔY(a) = * Δy
b: ΔY(b) = * Δy
c: ΔY(c) = * Δy
: ΔY=Y1-Y0=ΔY(a) +ΔY(b)+ΔY(c)
, Y=a/(b+c)
:
1. (a,b) Y
Y1=a1*b1 Y0=a0+b0?
ΔY=Y1-Y0
|
|
ΔY(a)= Δa*b0 + 0,5 * Δa*Δb
b
ΔY(b)= Δb*a0 + 0,5 * Δa*Δb
:
ΔY=Y1-Y0=ΔY(a) + ΔY(b)
2. (a,b,c), Y
Y1=a1+b1+c1 Y0=a0+b0+c0
ΔY(a)=0,5* Δ a*(b0*c1+b1*c0) + 0,333* Δa *Δb* Δc
ΔY(b)=0,5* Δ b*(a0*c1+a1*c0) + 0,333* Δa *Δb* Δc
ΔY(c)=0,5* Δ c*(a0*b1+a1*b0) + 0,333* Δa *Δb* Δc
ΔY=Y1-Y0=ΔY(a)+ΔY(b)+ΔY(c)
:
. , , . , . , - .
, ().
. , :
f=xyz (79)
, :
lgf=lgx+lgy+lgz (80)
, , , :
lg(f1:fo)=lg(x1:xo)+lg(y1:yo)+lg(z1:zo) (81)
lgIf=lgIx+lgIy+lgIz (82)
lgIf ∆f :
∆f=∆f(lgIx/lgIf)+∆f(lgIy/lgIf)+∆f(lgIz/lgIf)= ∆fx+∆fy+∆fz (83)
:
∆fx=∆f(lgIx/lgIf) (84)
∆fy=∆f(lgIy/lgIf) (85)
∆fz=∆f(lgIz/lgIf) (86)
, . , - [1].
,
+ | + | + | + | |
+ | - | + | - | |
+ | - | - | Y=a(b-c) | |
+ | - | - | - | |
- | + | - | Y=a/ | |
+ | - | + | Y=a/ | |
+ | - | - | - |