4/f=2/1

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Solution for 4/f=2/1 equation: 


D( f )

f = 0

f = 0

f = 0

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

4/f = 2/1 // - 2/1

4/f-(2/1) = 0

4/f-2 = 0

4*f^-1 = 2 // : 4

f^-1 = 1/2

-1 < 0

1/(f^1) = 1/2 // * f^1

1 = 1/2*f^1 // : 1/2

2 = f^1

f = 2

f = 2

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