3. Consider the following property: for any ε>0, there exists
N∈N so that whenever n≥N,|u_n+1−u_n|<ε.
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- What is the difference between this property and the definition
of a Cauchy sequence?
- Find a convergent sequence which has this property.
- Find a divergent sequence which has this property. (Hint: can
you think of a function f(x) which grows to infinity very
slowly? Then try a_n=f(n).