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D( x )
2*x-1 = 0
2*x-1 = 0
2*x-1 = 0
2*x-1 = 0 // + 1
2*x = 1 // : 2
x = 1/2
x in (-oo:1/2) U (1/2:+oo)
5/(2*x-1) > 0
( 2*x-1 )
2*x-1 > 0 // + 1
2*x > 1 // : 2
x > 1/2
( 5 )
5 > 0
x należy do R
(-oo:1/2) (1/2:+oo) 2*x-1 - + 5 + +
x in (1/2:+oo)
(1/2:+oo)
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