7=7/y

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Solution for 7=7/y equation: 


D( y )

y = 0

y = 0

y = 0

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

7 = 7/y // - 7/y

7-(7/y) = 0

7-7*y^-1 = 0

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

y^-1 = 1

-1 < 0

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

1 = 1*y^1 // : 1

1 = y^1

y = 1

y = 1

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