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x in (-oo:+oo)
(H/h)/10 = -22/5 // + -22/5
(H/h)/10-(-22/5) = 0
(H/h)/10+22/5 = 0
1/10*H*h^-1+22/5 = 0
x należy do R
x in (-oo:+oo)
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