7/y=9/y-1/2

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Solution for 7/y=9/y-1/2 equation: 


D( y )

y = 0

y = 0

y = 0

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

7/y = 9/y-(1/2) // - 9/y-(1/2)

7/y-(9/y)+1/2 = 0

7/y-9*y^-1+1/2 = 0

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

y^-1 = 1/4

-1 < 0

1/(y^1) = 1/4 // * y^1

1 = 1/4*y^1 // : 1/4

4 = y^1

y = 4

y = 4

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