Question: If prove that lim x 0 f (x) 0. .2 x? if x is rational if x is irrational F(x) =

If 

.2 x? if x is rational if x is irrational F(x) =


prove that limx → 0 f (x) − 0.

.2 x? if x is rational if x is irrational F(x) =

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