1,446 prompts matching "IGCSE-style question: Proving that a sequence is arithmetic"
Worked example: The formula for the number in a union
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Teach me: What makes a sentence a logical statement
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Worked example: The converse, inverse and contrapositive
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Teach me: How many rows a truth table needs
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Worked example: A tautology and a contradiction
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Teach me: What changing the subject of a formula means
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Worked example: Changing the subject when the letter occurs on both sides
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Teach me: Direct variation and its constant
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Worked example: Using the constant to predict a further value
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Worked example: Solving by setting each factor to nought
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Teach me: Why completing the square works
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Worked example: Substituting into the quadratic formula carefully
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Teach me: The parabola and which way it opens
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Worked example: Solving a related equation by adding a line to the graph
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Teach me: The arc as a fraction of the circumference
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Worked example: The perimeter of a segment
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Teach me: The sector area as a fraction of the circle
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Worked example: Rolling a sector into a cone
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Teach me: The volume of a cuboid and of a cube
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Worked example: The slant height in a cone's surface area
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