755 prompts matching "Counting the handshakes, or the lines joining n points"
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Worked Example: Squaring both sides safely when solving a surd equation
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Show All Working: Finding a and b when a plus b root 2 equals a given surd
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Show All Working: Evaluating a repeated operation such as a*(b*c)
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Show All Working: Showing a set is not closed by a single counter-example
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Worked Example: Testing a*b against b*a for a given rule
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Show All Working: An operation that is associative but not commutative
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Show All Working: Using distributivity to simplify an expression
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Show All Working: An element with no inverse under a given operation
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Show All Working: Simplifying an expression with letters and indices
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Worked Example: Rewriting a negative index as a fraction
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Worked Example: Solving an indicial equation where one side must be factorised first
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Show All Working: A word problem that leads to an indicial equation
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Worked Example: Writing an index statement as a logarithm
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Show All Working: Solving a simple logarithmic equation
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Worked Example: Converting a logarithm to base ten so that tables can be used
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Show All Working: Comparing logarithms given in different bases
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Show All Working: A geometric progression with a fractional common ratio
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Explain Back: Solving a linear inequality that contains brackets
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Spot My Mistake: Solving a linear inequality that contains a fraction
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Show All Working: Writing a quadratic solution set in interval form
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