Show that if 5/3< 2x< 11/3, then x∈{y∈R such that |y- 4/3| < 1/2}
Therefore if 53<2x<113,\dfrac{5}{3}<2x<\dfrac{11}{3},35<2x<311, then ∣x−43∣<12.|x-\dfrac{4}{3}|<\dfrac{1}{2}.∣x−34∣<21.
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