755 prompts matching "Quiz: The number of arrangements of r objects chosen from n"
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Explain Back: Why 2 root 3 and 5 root 3 count as similar surds
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Spot My Mistake: Why root 8 and root 2 turn out to be similar
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Explain Back: Multiplying root a by root b
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WAEC Prep: Squaring a single surd
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Worked Example: Rationalising a denominator that is a single surd
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WAEC Prep: Rationalising a denominator inside a larger expression
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Worked Example: Squaring both sides safely when solving a surd equation
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Spot My Mistake: Solving a surd equation that leads to a quadratic
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Worked Example: Testing a*b against b*a for a given rule
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Explain Back: What it means for an operation to be associative
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Spot My Mistake: Testing (a*b)*c against a*(b*c)
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WAEC Prep: An operation that is commutative but not associative
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Explain Back: Showing distributivity fails by a counter-example
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WAEC Prep: A rule where distributivity holds one way only
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Explain Back: What an inverse element is
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WAEC Prep: Applying two index laws inside one expression
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Worked Example: Rewriting a negative index as a fraction
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Explain Back: A fractional index with a numerator above one
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Spot My Mistake: A negative fractional index
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Worked Example: Solving an indicial equation where one side must be factorised first
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