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x^4 = 81
x = √czw. stopnia z 81
x = 3
logx3 = 1/2
x^1/2 = 3
x=9
logx64 = -3
x^-3 = 64
(1/4)^-3 = (4/1)^3 = (64/1) = 64
x= 1/4
logx27=3
x^3=27
x=3
logx36= -2
x^-2 = 36
(1/6)^-2 = (6/1)^2= 36
x = 1/6