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x in (-oo:+oo)
(2/9)^3*(2/9)^6 = (2/9)^2*m-l // - (2/9)^2*m-l
l-((2/9)^2*m)+(2/9)^3*(2/9)^6 = 0
l-4/81*m+512/387420489 = 0
x należy do R
x in (-oo:+oo)
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