755 prompts matching "Using concurrence to locate an unknown line of action"
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Worked Example: Rewriting a negative index as a fraction
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Common Mistakes: Writing a root as a fractional index before simplifying
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Common Mistakes: Reading a logarithm from a table
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Show All Working: Solving a simple logarithmic equation
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Common Mistakes: Rejecting a root that makes a logarithm undefined
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Final Revision: Proving a logarithmic identity from the laws
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Show All Working: Comparing logarithms given in different bases
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Common Mistakes: A logarithmic equation that becomes a quadratic
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Worked Example: The alternative sum formula that uses the last term
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Common Mistakes: Proving the sum formula by pairing the terms
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Learn: What makes a sequence a geometric progression
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Show All Working: A geometric progression with a fractional common ratio
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Final Revision: Deciding whether a given sequence is a geometric progression
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Final Revision: Proving the sum formula for a geometric progression
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Worked Example: Adding or subtracting the same number on both sides
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Show All Working: Writing a quadratic solution set in interval form
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Final Revision: Writing the inequalities that describe a shaded region
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IGCSE Additional Maths Y10: Proving that a quadratic expression is always positive — Show All Working
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IGCSE Additional Maths Y10: Rejecting a root that the substitution forbids — Show All Working
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IGCSE Additional Maths Y10: A surd arising from the quadratic formula — Show All Working
I am a Year 10 pupil taking Cambridge IGCSE Additional Mathematics. Set me a question on a