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x in (-oo:+oo)
R = (S/3.14)*s-r // - (S/3.14)*s-r
R+r-((S/3.14)*s) = 0
R+r-0.31847134*S*s = 0
R+r-0.31847134*S*s = 0
x należy do R
x in (-oo:+oo)
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