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x=0,5m
y=2m
x2=0,5m + 0,1m=0,6m
Szukane:
y2=?
1/f=1/x + 1/y=1/x2 + 1/y2
1/y2=1/x + 1/y - 1/x2
1/y2=(y*x2 + x*x2 - x*y)/(x*y*x2)
y2=(x*y*x2)/(y*x2 + x*x2 - x*y)
y2=(0,5m*2m*0,6m)/(2m*0,6m + 0,5m*0,6m - 0,5m*2m)=
=(0,6)/(1,2 + 0,03 - 1) m=(0,6)/(0,23) m= 2,60869565217 m