1,029 prompts matching "Learn: Telling a rational number from an irrational one"
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Worked Example: Factorising a cubic into a linear and a quadratic factor
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Final Revision: Checking a factorisation by expanding it again
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Worked Example: How many roots a cubic equation has
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Spot My Mistake: Finding the remaining roots once one is known
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Common Mistakes: A cubic equation arising from a volume problem
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Final Revision: The exclusive sense of or, and its truth table
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Final Revision: A conditional statement set in an everyday situation
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Practice: What logical equivalence means
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Spot My Mistake: De Morgan's laws in logic
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Worked Example: Premises and conclusion
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Final Revision: An argument written in words and tested for validity
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Worked Example: Arranging r of n objects in a line
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Practice: Arrangements of a word with repeated letters
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Explain Back: Arrangements restricted at the first letter
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Spot My Mistake: Arrangements with two particular items adjacent
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Final Revision: Counting the arrangements of people in a queue
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Practice: Circular arrangements with two people together
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Explain Back: Circular arrangements with two people kept apart
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Spot My Mistake: Arrangements round a table with men and women alternating
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Common Mistakes: The number of ways of dividing a class into groups
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