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D( x )
x = 0
2*x = 0
x = 0
x = 0
2*x = 0
2*x = 0
2*x = 0 // : 2
x = 0
x in (-oo:0) U (0:+oo)
1/x-((3/5)*(5/(2*x)-(5/3))) = 1/2 // - 1/2
1/x-((3/5)*(5/(2*x)-(5/3)))-(1/2) = 0
(-3/5)*(5/(2*x)-5/3)+1/x-1/2 = 0
1/x-3/5*(5/2*x^-1-5/3)-1/2 = 0
(-3/5*2*x*(5/2*x^-1-5/3))/(2*x)+(1*2)/(2*x)+(-1*x)/(2*x) = 0
1*2-3/5*2*x*(5/2*x^-1-5/3)-1*x = 0
2*x-x-1 = 0
x-1 = 0
(x-1)/(2*x) = 0
(x-1)/(2*x) = 0 // * 2*x
x-1 = 0
x-1 = 0 // + 1
x = 1
x = 1
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