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ehrenfest
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Homework Statement
Suppose [itex]a_n > 0[/itex], [itex]s_n =a_1 + ... + a_n[/itex], and [itex]\sum a_n[/itex] diverges,
a) Prove that
[tex]\sum \frac{a_n}{1+a_n}[/tex]
diverges.
Homework Equations
The Attempt at a Solution
Comparison with a_n fails miserably.
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