F=2 м Г=4 d=?
1/F=1/d+1/f Г=f/d f=Г*d
d=F*(1+1/Г)=2*(1+1/4)=2,5 м
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F=2 м Г=4 d=?
1/F=1/d+1/f Г=f/d f=Г*d
d=F*(1+1/Г)=2*(1+1/4)=2,5 м
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