755 prompts matching "The general form ax plus by plus c equals nought"
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Deriving the geometric series sum formula
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Finding the first term or common difference from the sum formula
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Finding the equation of a line parallel to the x-axis or y-axis through a point
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Spot My Mistake: Dividing one surd by another
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Quiz: Rationalising a denominator of the form one over root 3
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Common Mistakes: Rationalising a denominator of the form root a over root b
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Final Revision: Expressing a rationalised answer in the form a root b over c
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Worked Example: Why multiplying by the conjugate clears the surd
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Worked Example: Testing whether star distributes over plus
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Common Mistakes: Checking an inverse by working the operation both ways
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Learn: Why any non-zero number to the power nought is one
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Learn: Solving an equation by writing both sides to the same base
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Practice: Solving 2 to the power x equals 32
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Learn: The change of base formula
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Quiz: The formula for the nth term of an arithmetic progression
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Learn: The formula for the sum of the first n terms of an arithmetic progression
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Worked Example: The alternative sum formula that uses the last term
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Quiz: The formula for the nth term of a geometric progression
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Learn: The formula for the sum of the first n terms of a geometric progression
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Worked Example: Which form of the sum formula to use when r is less than one
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