1,333 prompts matching "De Morgan's laws in logic"
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Explain Back: Rationalising a denominator of the form a plus root b using the conjugate
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Common Mistakes: Solving an equation in which the unknown sits under a root
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Learn: The multiplication and division laws of indices used together
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Worked Example: Simplifying an expression carrying both a negative and a fractional index
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Quiz: Solving an index equation by writing both sides to the same base
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Practice: Converting between index form and logarithm form
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Learn: The degree of a polynomial and its leading coefficient
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Explain Back: Finding an unknown coefficient given that a stated factor divides the polynomial
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Practice: Solving an inequality with the unknown in the denominator
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Final Revision: Counting the number plates or codes that can be formed under a rule
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Spot My Mistake: The identity that n choose r equals n choose n minus r
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Learn: The Pythagorean identity, sin squared plus cos squared equals one
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Final Revision: Proving an identity by working on one side only
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Learn: Solving sin x equals a given value between 0 and 360 degrees
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Spot My Mistake: Solving an equation by first applying a Pythagorean identity
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Explain Back: Deciding whether a point lies inside, on or outside a circle
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Common Mistakes: Identifying a conic from a general second-degree equation
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Final Revision: The focus-directrix definition shared by all the conics
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Worked Example: The interquartile range of a set of ordered data
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WAEC Prep: The standard deviation of grouped data using an assumed mean
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