1/77-4/x

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Solution for 1/77-4/x equation: 


D( x )

x = 0

x = 0

x = 0

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

1/77-(4/x) = 0

1/77-4*x^-1 = 0

-4*x^-1 = -1/77 // : -4

x^-1 = 1/308

-1 < 0

1/(x^1) = 1/308 // * x^1

1 = 1/308*x^1 // : 1/308

308 = x^1

x = 308

x = 308

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