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zad.2.
log_(8)x=log_(2)y=log_(2)z=2
log_(8)x=2
x=8^2=64
log_(2)y=2
y=2^2=4
log_(2)z=2
z=2^2=4
V[4]Vx*y*z=V[4]V(64*4*4)=[4]V1024=[4]V(4)^5=4V4
( [4]V oznacza pierwiastek 4 stopnia)