787 prompts matching "Explaining why we rationalise denominators"
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Learn: Solving a linear inequality, and reversing the sign on dividing by a negative
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Worked Example: Solving a quadratic inequality by sketching the parabola
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Quiz: Solving a quadratic inequality using a sign table
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Spot My Mistake: Showing the solution of an inequality on a number line
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WAEC Prep: Writing a solution set in interval notation
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Show All Working: Solving a pair of simultaneous linear inequalities
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Final Revision: The region of the plane satisfying a set of linear inequalities
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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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Spot My Mistake: Arrangements in which two particular objects must be kept apart
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WAEC Prep: Circular permutations of n objects round a table
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Show All Working: Arrangements of the letters of a given word
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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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Quiz: Choosing a committee of r people from n
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Spot My Mistake: The identity that n choose r equals n choose n minus r
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WAEC Prep: Pascal's triangle and the combination numbers in it
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Show All Working: Counting the handshakes, or the lines joining n points
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Final Revision: Combinations used with the addition and multiplication principles
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