1,333 prompts matching "Checking an inverse by working the operation both ways"
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WAEC Prep: Forming an equation whose roots are each two more than the original
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Quiz: The factor theorem, and testing whether x minus a is a factor
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Explain Back: Finding an unknown coefficient given that a stated factor divides the polynomial
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Final Revision: The zeros of a polynomial and where its graph cuts the x-axis
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Spot My Mistake: The relations between roots and coefficients for a quartic
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Spot My Mistake: Showing the solution of an inequality on a number line
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Common Mistakes: The range of values of x for which an expression stays positive
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Final Revision: The region of the plane satisfying a set of linear inequalities
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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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Common Mistakes: Arrangements restricted at the first or the last place
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Final Revision: Counting the number plates or codes that can be formed under a rule
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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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Final Revision: Combinations used with the addition and multiplication principles
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Worked Example: The identities for one plus tan squared and one plus cot squared
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Quiz: The compound angle formula for sine of A plus B
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Explain Back: The compound angle formula for tan of A plus B
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Spot My Mistake: The double angle formula for sine
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