1/y-7

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Solution for 1/y-7 equation: 


D( y )

y = 0

y = 0

y = 0

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

1/y-7 = 0

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

y^-1 = 7

-1 < 0

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

1 = 7*y^1 // : 7

1/7 = y^1

y = 1/7

y = 1/7

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