(10/y)-3y

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Solution for (10/y)-3y equation: 


D( y )

y = 0

y = 0

y = 0

y in (-oo:0) U (0:+oo)

10/y-(3*y) = 0

10/y-3*y = 0

10*y^-1-3*y^1 = 0

(10*y^0-3*y^2)/(y^1) = 0 // * y^2

y^1*(10*y^0-3*y^2) = 0

y^1

10-3*y^2 = 0

10-3*y^2 = 0

DELTA = 0^2-(-3*4*10)

DELTA = 120

DELTA > 0

y = (120^(1/2)+0)/(-3*2) or y = (0-120^(1/2))/(-3*2)

y = (-30^(1/2))/3 or y = (1*30^(1/2))/3

y in { (-30^(1/2))/3, (1*30^(1/2))/3} 

y in { (-30^(1/2))/3, (1*30^(1/2))/3 }

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