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D( x )
x-6 = 0
x = 0
x-6 = 0
x-6 = 0
x-6 = 0 // + 6
x = 6
x = 0
x = 0
x in (-oo:0) U (0:6) U (6:+oo)
50/(x-6) = 50/x+55/60 // - 50/x+55/60
50/(x-6)-(50/x)-(55/60) = 0
50/(x-6)-50*x^-1-11/12 = 0
50/(x-6)-50/x-11/12 = 0
(12*50*x)/(12*x*(x-6))+(-50*12*(x-6))/(12*x*(x-6))+(-11*x*(x-6))/(12*x*(x-6)) = 0
12*50*x-50*12*(x-6)-11*x*(x-6) = 0
66*x-11*x^2+3600 = 0
66*x-11*x^2+3600 = 0
66*x-11*x^2+3600 = 0
DELTA = 66^2-(-11*4*3600)
DELTA = 162756
DELTA > 0
x = (162756^(1/2)-66)/(-11*2) or x = (-162756^(1/2)-66)/(-11*2)
x = (6*4521^(1/2)-66)/(-22) or x = (-6*4521^(1/2)-66)/(-22)
(x-((6*4521^(1/2)-66)/(-22)))*(x-((-6*4521^(1/2)-66)/(-22))) = 0
((x-((6*4521^(1/2)-66)/(-22)))*(x-((-6*4521^(1/2)-66)/(-22))))/(12*x*(x-6)) = 0
((x-((6*4521^(1/2)-66)/(-22)))*(x-((-6*4521^(1/2)-66)/(-22))))/(12*x*(x-6)) = 0 // * 12*x*(x-6)
(x-((6*4521^(1/2)-66)/(-22)))*(x-((-6*4521^(1/2)-66)/(-22))) = 0
( x-((-6*4521^(1/2)-66)/(-22)) )
x-((-6*4521^(1/2)-66)/(-22)) = 0 // + (-6*4521^(1/2)-66)/(-22)
x = (-6*4521^(1/2)-66)/(-22)
( x-((6*4521^(1/2)-66)/(-22)) )
x-((6*4521^(1/2)-66)/(-22)) = 0 // + (6*4521^(1/2)-66)/(-22)
x = (6*4521^(1/2)-66)/(-22)
x in { (-6*4521^(1/2)-66)/(-22), (6*4521^(1/2)-66)/(-22) }
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