42y^3/6y^-2

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Solution for 42y^3/6y^-2 equation: 


D( y )

y = 0

y = 0

y = 0

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

y^-2*((42*y^3)/6) = 0

7*y = 0 // : 7

y = 0

y in { 0} 

y belongs to the empty set

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