1,043 prompts matching "Explain the identity matrix"
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Common Mistakes: The fallacy of denying the antecedent
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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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WAEC Prep: Beads on a necklace, and why the count halves
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Show All Working: A circular arrangement with one fixed seat such as the head
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Quiz: Selecting from two groups at the same time
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Show All Working: Selecting a committee with the chairman named separately
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Common Mistakes: The number of ways of dividing a class into groups
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Quiz: The probability of drawing two red balls
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Practice: The probability of drawing one ball of each colour
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Spot My Mistake: The probability that a committee contains a given person
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WAEC Prep: The probability of at least one of a kind
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Show All Working: The complement rule used in a counting problem
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Quiz: Expanding a bracket to the power four using Pascal's triangle
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Practice: The symmetry of a row of Pascal's triangle
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Show All Working: The binomial coefficients written as n choose r
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Common Mistakes: The link between Pascal's triangle and combinations
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Final Revision: Expanding a bracket of the form a plus b over x
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Learn: The formula for the general term of an expansion
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Quiz: Finding the term in x cubed
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