Y=4/x-5+7

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Solution for Y=4/x-5+7 equation: 


D( x )

x = 0

x = 0

x = 0

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

Y = 4/x-5+7 // - 4/x-5+7

Y-(4/x)-7+5 = 0

Y-4*x^-1-7+5 = 0

-4*x^-1 = -(Y-2) // : -4

x^-1 = (2-Y)/(-4)

-1 < 0

1/(x^1) = (2-Y)/(-4) // * x^1

1 = x^1*((2-Y)/(-4)) // : (2-Y)/(-4)

-4*(2-Y)^-1 = x^1

x = -4*(2-Y)^-1

x = -4*(2-Y)^-1

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