Ответ:
156 B) 157 B)
Объяснение:
156) d=0.5 м D=6 дптр h/H=?
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F=1/D=1/6=0.17 м
1/F=1/d+1/f
f=F*d/(d-F)=0.17*0.5/(0.5-0.17)=0.25 м
h/H=d/f=0.5/0.25=2
==========================
157) f/d=2 D=3 дптр d=?
f=3*d
D=1/F=1/d+1/f=3/(2*d)=3
d=0.5 м (50 см)
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Verified answer
Ответ:
156 B) 157 B)
Объяснение:
156) d=0.5 м D=6 дптр h/H=?
===
F=1/D=1/6=0.17 м
1/F=1/d+1/f
f=F*d/(d-F)=0.17*0.5/(0.5-0.17)=0.25 м
h/H=d/f=0.5/0.25=2
==========================
157) f/d=2 D=3 дптр d=?
===
f=3*d
D=1/F=1/d+1/f=3/(2*d)=3
d=0.5 м (50 см)
======================================