((4y+1)/(9y^4))/((y+2)/y^3)

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Solution for ((4y+1)/(9y^4))/((y+2)/y^3) equation: 


D( y )

y^3 = 0

(y+2)/(y^3) = 0

9*y^4 = 0

y^3 = 0

y^3 = 0

1*y^3 = 0 // : 1

y^3 = 0

y = 0

(y+2)/(y^3) = 0

(y+2)/(y^3) = 0

y+2 = 0 // - 2

y = -2

9*y^4 = 0

9*y^4 = 0

9*y^4 = 0 // : 9

y^4 = 0

y = 0

y in (-oo:-2) U (-2:0) U (0:+oo)

((4*y+1)/(9*y^4))/((y+2)/(y^3)) = 0

(y^3*(4*y+1))/(9*y^4*(y+2)) = 0

( 4*y+1 )

4*y+1 = 0 // - 1

4*y = -1 // : 4

y = -1/4

( y^3 )

1*y^3 = 0 // : 1

y^3 = 0

y = 0

y in { 0} 

y = -1/4

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