f/2-1

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Solution for f/2-1 equation: 


f in (-oo:+oo)

f/2 > -1 // + 1

f/2+1 > 0

1/2*f+1 > 0 // - 1

1/2*f > -1 // : 1/2

f > -1/1/2

f > -2

f in (-2:+oo)

(-2:+oo)

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