494 prompts matching "Testing whether a relation is a function"
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Learn: What a sequence is, and what a term means
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Common Mistakes: The Fibonacci sequence and the rule behind it
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Spot My Mistake: Finding the common difference from two given terms
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Common Mistakes: An arithmetic progression with a negative common difference
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Practice: Finding n when the sum of an arithmetic progression is given
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Spot My Mistake: The sum of an arithmetic progression with a negative common difference
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Common Mistakes: Proving the sum formula by pairing the terms
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Spot My Mistake: Finding the common ratio when the third and sixth terms are given
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Common Mistakes: Inserting a geometric mean between two numbers
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Worked Example: Which form of the sum formula to use when r is less than one
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Practice: Finding n when the sum of a geometric progression is given
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Spot My Mistake: A compound interest problem modelled by a geometric progression
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Show All Working: The sum to infinity of a geometric progression, and when it exists
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Common Mistakes: A bouncing ball problem, and the total distance travelled
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Spot My Mistake: Solving a linear inequality that contains a fraction
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Common Mistakes: A double inequality such as 2 less than x less than 7
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Learn: Factorising a quadratic before solving the inequality
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Common Mistakes: A quadratic inequality that has to be rearranged first
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Spot My Mistake: The graph of y equals modulus of x
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Show All Working: The region satisfying two linear inequalities together
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