7/15-2/y

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Solution for 7/15-2/y equation: 


D( y )

y = 0

y = 0

y = 0

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

7/15-(2/y) = 0

7/15-2*y^-1 = 0

-2*y^-1 = -7/15 // : -2

y^-1 = 7/30

-1 < 0

1/(y^1) = 7/30 // * y^1

1 = 7/30*y^1 // : 7/30

30/7 = y^1

y = 30/7

y = 30/7

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