1,045 prompts matching "Finding the number of terms in an arithmetic series"
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Show All Working: Choosing between factorising and the formula
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Common Mistakes: A sign error in the formula, and how to catch it
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Learn: The sum of the roots as minus b over a
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Explain Back: Finding a missing coefficient from a stated sum of roots
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Common Mistakes: Roots that are reciprocals of one another
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Learn: What makes an expression in the roots symmetric
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Common Mistakes: A symmetric function needing the sum and product twice over
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Learn: Making one unknown the subject of the linear equation
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Show All Working: A simultaneous pair in which the second equation is a circle
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Quiz: The condition for two points of intersection
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Show All Working: The point of contact when a line touches a curve
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Common Mistakes: A line and a curve meeting once without the line being a tangent
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Worked Example: The degree of a polynomial in one variable
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Common Mistakes: Multiplying one polynomial by another
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Learn: Setting out the division of a cubic by a linear expression
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WAEC Prep: Dividing by a factor of the form ax plus b
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Learn: The statement of the remainder theorem
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Show All Working: A remainder of nought, and what it means
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Worked Example: Testing a list of candidates to find a factor
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Practice: Factorising a quartic as the product of two quadratics
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