Vault Of Euclid

Divergence of the p-series for p <= 1

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If \( 0 < p \le 1 \), show that the series \( \sum_{n=1}^{\infty} \frac{1}{n^p} = 1 + \frac{1}{2^p} + \frac{1}{3^p} + \cdots \) is divergent.
infinite-seriesdivergencep-seriescomparison-testdirect-comparison-testharmonic-seriesinequalitiescalculus-iireal-analysisprove-divergenceexponentspositive-terms

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What you need first

What this problem tests

Tests the ability to apply the Direct Comparison Test and manipulate basic inequalities involving exponents.

This is a foundational result in calculus and real analysis, establishing the behavior of the p-series for small powers.