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t in (-oo:+oo)
9 > (t-8)/4 // - (t-8)/4
9-((t-8)/4) > 0
(-1*(t-8))/4+9 > 0
(-1*(t-8))/4+(4*9)/4 > 0
4*9-1*(t-8) > 0
44-t > 0
(44-t)/4 > 0
(44-t)/4 > 0 // * 4^2
4*(44-t) > 0
( 4 )
4 > 0
t należy do R
( 44-t )
44-t > 0
-t > -44 // * -1
t < 44
(-oo:44) (44:+oo) 4 + + 44-t + -
t in (-oo:44)
(-oo:44)
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