755 prompts matching "Comparing the mean with the variance of a binomial distribution"
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Multiplying two algebraic fractions
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Quiz me rapid-fire on expanding and factorising
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Worked Example: What makes two surds equal
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Practice: Collecting similar surds in an expression
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Explain Back: Why 2 root 3 and 5 root 3 count as similar surds
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Practice: Multiplying a whole number by a surd
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Explain Back: Multiplying root a by root b
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Worked Example: Rationalising a denominator that is a single surd
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Worked Example: Squaring both sides safely when solving a surd equation
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Practice: A binary operation set out as a table
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Practice: Testing a set for closure under multiplication
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Worked Example: Testing a*b against b*a for a given rule
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Practice: Multiplication distributing over addition in ordinary arithmetic
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Explain Back: Showing distributivity fails by a counter-example
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Practice: Why an identity element must work from both sides
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Explain Back: What an inverse element is
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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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Worked Example: Writing an index statement as a logarithm
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Practice: Combining two logarithms into one
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