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Pr=k |:P
r=k/P
Odp. C
2. n=0,8b |×10
10n=8b |:8
b=1,25n
Odp. B
3. P=½ah |×2
2P=ah |:a
h=2P/a
Odp. D
p*r= k/:p
r= k:r
odp.c
2c
3,d