699 prompts matching "Expressions that are not polynomials, and why not"
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Common Mistakes: Expressing root 50 as a multiple of root 2
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Show All Working: Checking a rationalised answer by decimal approximation
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Common Mistakes: Rationalising a denominator of the form root a over root b
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Show All Working: A conjugate where the surd term comes first
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Show All Working: Evaluating a repeated operation such as a*(b*c)
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Common Mistakes: Closure on a set of three elements under a stated rule
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Common Mistakes: Subtraction as an example of neither law
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Common Mistakes: Distributivity on a set of three elements
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Show All Working: An element with no inverse under a given operation
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Common Mistakes: Checking an inverse by working the operation both ways
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Common Mistakes: Writing a root as a fractional index before simplifying
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Common Mistakes: An indicial equation solved by substitution
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Show All Working: The common logarithm, to base ten
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Common Mistakes: Reading a logarithm from a table
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Show All Working: Solving a simple logarithmic equation
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Show All Working: Comparing logarithms given in different bases
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Show All Working: Deciding whether a given number is a term of a sequence
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Show All Working: Deciding whether a number belongs to a given arithmetic progression
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Common Mistakes: An arithmetic progression with a negative common difference
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Show All Working: The sum of the terms lying between two given positions
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