// Numbas version: exam_results_page_options {"name": "Calculating powers (a^(-1))", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"statement": "

Calculate the following power.

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If you think the answer should be negative then a negative sign should be entered in the denominator.

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", "variablesTest": {"condition": "", "maxRuns": 100}, "name": "Calculating powers (a^(-1))", "metadata": {"description": "

This question tests a student's ability to raise a positive base to an exponent of -1.

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\$\\var{a}^{-1}=\\ \$ 1[[0]].

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This is the base.

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The correct calculation is \$\\var{a}^{-1}=\\dfrac{1}{\\var{a}^1}=\\dfrac{1}{\\var{a}}\$.

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Remember that any number raised to the power 1 is just the number itself.

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