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Forholdstesten kan bare brukes ved potensrekker.

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Forholdstesten kan bare brukes ved alternerende rekker.

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Forholdstesten gir ingen konklusjon.

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Forholdstesten brukes bare for å finne konvergensintervall.

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Hvorfor kan vi ikke bruke forholdstesten for å finne ut om rekka $\\displaystyle{\\sum_{n=1}^{\\infty}\\frac{3}{n^2 - n}}$ konvergerer?

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