40/y=9

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Solution for 40/y=9 equation: 


D( y )

y = 0

y = 0

y = 0

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

40/y = 9 // - 9

40/y-9 = 0

40*y^-1 = 9 // : 40

y^-1 = 9/40

-1 < 0

1/(y^1) = 9/40 // * y^1

1 = 9/40*y^1 // : 9/40

40/9 = y^1

y = 40/9

y = 40/9

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