1,327 prompts matching "Learn: The formula for the sum of the first n terms of an arithmetic progression"
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Common Mistakes: The range of values of x for which an expression stays positive
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Learn: The meaning of n factorial, and how to evaluate it
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Learn: The meaning of n choose r, and how to evaluate it
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Spot My Mistake: The double angle formula for sine
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Common Mistakes: Expressing a cos x plus b sin x in the form R cos of x minus alpha
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Learn: The shape, period and range of the sine curve
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Worked Example: The midpoint formula applied to a given segment
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Learn: The equation of a circle with its centre at the origin
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Worked Example: The parametric form of a point on a parabola
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Learn: The range, and why it is a weak measure of spread
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WAEC Prep: The standard deviation of grouped data using an assumed mean
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Common Mistakes: The coefficient of variation, for comparing two sets
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Quiz: The principle of moments for a body in equilibrium
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Common Mistakes: The centre of gravity of a uniform lamina
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Learn: The velocity of one body relative to another
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Learn: The defining equation of simple harmonic motion
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Learn: Hooke's law, and what the modulus of elasticity means
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Spot my mistake: Adding the magnitudes of concurrent forces to get the magnitude of their resultant
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Spot my mistake: Treating the action and the reaction of Newton's third law as forces acting on the same body
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Learn: Finding two unknown forces by Lami's theorem
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