3/10-7/y

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Solution for 3/10-7/y equation: 


D( y )

y = 0

y = 0

y = 0

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

3/10-(7/y) = 0

3/10-7*y^-1 = 0

-7*y^-1 = -3/10 // : -7

y^-1 = 3/70

-1 < 0

1/(y^1) = 3/70 // * y^1

1 = 3/70*y^1 // : 3/70

70/3 = y^1

y = 70/3

y = 70/3

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