1,331 prompts matching "IGCSE Additional Maths Y11: Checking an answer for reasonableness — Show All Wor"
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Common Mistakes: Adding, subtracting and multiplying two polynomials
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Explain Back: Forming a cubic equation whose three roots are given
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Explain Back: Solving an inequality that involves a modulus
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Worked Example: The number of arrangements of n different objects in a row
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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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Worked Example: The difference between a permutation and a combination
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Worked Example: Solving cos x equals a negative value, and finding both solutions
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Worked Example: The shape, period and range of the cosine curve
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Common Mistakes: The angle between two lines found from their gradients
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Worked Example: The equation of a circle with a given centre and radius
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Explain Back: The eccentricity of an ellipse
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Worked Example: The interquartile range of a set of ordered data
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Explain Back: The variance of an ungrouped set of data
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Explain Back: A particle on a rough table connected to a hanging particle
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Explain Back: The angle of friction, and the coefficient of friction
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Common Mistakes: The work done against friction on an incline
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Worked Example: The acceleration of a body moving round a circle at constant speed
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Explain Back: A car on a banked track
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Worked Example: The amplitude, period and frequency of a simple harmonic motion
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