755 prompts matching "The inverse of a 2 by 2 matrix as one over the determinant times the adjoint"
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Worked Example: Finding the common difference of an arithmetic progression
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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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Quiz: The sum of the first fifty natural numbers
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Spot My Mistake: The sum of an arithmetic progression with a negative common difference
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Show All Working: The sum of the terms lying between two given positions
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Common Mistakes: Proving the sum formula by pairing the terms
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Worked Example: Finding the common ratio of a geometric progression
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Quiz: The formula for the nth term of a geometric progression
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Explain Back: Finding the first term from two given terms 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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Quiz: The sum of the first six terms of a given geometric progression
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Explain Back: The sum of a geometric progression with a negative common ratio
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Show All Working: The sum to infinity of a geometric progression, and when it exists
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Learn: The four inequality symbols, and what each one means
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Worked Example: The critical values of a quadratic inequality
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Quiz: Using a sketch of the parabola to read off the solution
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Learn: What the modulus of a number means
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Worked Example: Solving the equation modulus of x equals a
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Explain Back: Solving an inequality such as modulus of 2x minus 1 less than 5
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