1,327 prompts matching "Learn: The formula for the sum of the first n terms of an arithmetic progression"
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Spot My Mistake: Solving an equation by first applying a Pythagorean identity
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Final Revision: The perpendicular distance from a point to a line
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Final Revision: The focus-directrix definition shared by all the conics
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Practice: The mean deviation from the mean
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Practice: A uniform beam resting on two supports
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Show All Working: Replacing two parallel forces by a single resultant
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Final Revision: A ladder leaning against a wall, and the moments acting on it
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Final Revision: Interception, where one body must catch another
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Practice: The maximum speed and the maximum acceleration in simple harmonic motion
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Show All Working: A mass on a spring performing simple harmonic motion
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Practice: The difference between an elastic string and a spring in compression
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Final Revision: The greatest extension reached by a falling particle on an elastic string
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Spot my mistake: Assuming multiplying a vector by a negative scalar leaves its magnitude negative
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Spot my mistake: Assuming a quadratic with a negative discriminant has no roots at all
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Spot my mistake: Using an equation of constant acceleration on a body whose acceleration is changing
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Solving an equation formed by equating two algebraic fractions
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Domain of a simple algebraic function
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Domain of a function involving a square root
I am in SS 3. Teach me finding the domain of a function involving a square root, such as f
Testing whether a relation is a function
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Showing that fg(x) is not the same as gf(x)
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