1,334 prompts matching "Sum of an arithmetic series given the first and last term"
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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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Learn: The meaning of n choose r, and how to evaluate it
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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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WAEC Prep: The three forms of the double angle formula for cosine
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Learn: The shape, period and range of the sine curve
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Worked Example: The shape, period and range of the cosine curve
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Final Revision: The graphs of y equals sec x, cosec x and cot x
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Explain Back: The equation of the line through two given points
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Spot My Mistake: The equation of the tangent to a circle at a point on it
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WAEC Prep: The length of the tangent from an external point
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Show All Working: The intersection of a circle and a straight line
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Quiz: The equation of the tangent to a parabola
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Explain Back: The eccentricity of an ellipse
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Spot My Mistake: The foci of an ellipse
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Learn: The range, and why it is a weak measure of spread
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Worked Example: The interquartile range of a set of ordered data
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