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a=2^(-2) m = (1/2)^2 m=1/4 m
b=?
P=a*b
a*b=1/64
1/4b=1/64 /*4
b=4/64
b=1/16
odp.
drugi bok ma długosc 1/16m
lub inaczej:
P=4^-3=2^-6 m2
2^-2b=2^-6 /:2^-2
b=2^-6/2^-2
b=2^-4 m ----- odp.