387 prompts matching "Inserting a geometric mean between two numbers"
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Worked Example: The discriminant, and what each of its three cases means
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WAEC Prep: Forming an equation whose roots are each two more than the original
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Show All Working: Finding a coefficient given a stated relation between the roots
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Common Mistakes: Adding, subtracting and multiplying two polynomials
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Worked Example: The sum of the products of the roots of a cubic taken two at a time
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Practice: Finding the third root of a cubic when two are known
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Spot My Mistake: The relations between roots and coefficients for a quartic
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Common Mistakes: Three roots in geometric progression in a cubic
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Spot My Mistake: Showing the solution of an inequality on a number line
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Learn: The meaning of n factorial, and how to evaluate it
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Worked Example: The number of arrangements of n different objects in a row
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Quiz: The number of arrangements of r objects chosen from n
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Explain Back: Arrangements in which two particular objects must stay together
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Spot My Mistake: Arrangements in which two particular objects must be kept apart
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Final Revision: Counting the number plates or codes that can be formed under a rule
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Learn: The meaning of n choose r, and how to evaluate it
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Worked Example: The difference between a permutation and a combination
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WAEC Prep: Pascal's triangle and the combination numbers in it
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Common Mistakes: Sketching two trigonometric curves on the same axes to find where they meet
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Quiz: The gradient of the line through two points
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