658 prompts matching "Explain why a complex number times its conjugate is real"
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WAEC Prep: Ordering a list of surds by size
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Learn: Simplifying root 72 into its simplest form
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Worked Example: Rationalising a denominator that is a single surd
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Quiz: Rationalising a denominator of the form one over root 3
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WAEC Prep: Rationalising a denominator inside a larger expression
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Learn: The conjugate of a compound surd expression
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Quiz: Rationalising a denominator of the form one over 2 plus root 3
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Show All Working: A conjugate where the surd term comes first
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Worked Example: Testing the even numbers for closure under addition
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Quiz: Testing the odd numbers for closure under addition
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WAEC Prep: An operation that is commutative but not associative
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Worked Example: Testing whether star distributes over plus
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Quiz: Left distributivity and right distributivity
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WAEC Prep: A rule where distributivity holds one way only
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WAEC Prep: The inverse of the identity element itself
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Worked Example: Solving an indicial equation where one side must be factorised first
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Worked Example: Writing out the terms of a sequence from its nth term
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Show All Working: Deciding whether a number belongs to a given arithmetic progression
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Quiz: The sum of the first fifty natural numbers
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Worked Example: Which form of the sum formula to use when r is less than one
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