1,322 prompts matching "Proving the sum formula for a geometric progression"
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Worked Example: Collecting like surds in a single sum
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Quiz: Multiplying two surds and simplifying the result
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Learn: The multiplication and division laws of indices used together
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Quiz: Solving an index equation by writing both sides to the same base
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Practice: Converting between index form and logarithm form
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Spot My Mistake: The power law of logarithms
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Final Revision: Sketching the graph of a logarithmic function
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Quiz: Forming a quadratic equation whose roots are given
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Spot My Mistake: Forming an equation whose roots are alpha squared and beta squared
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WAEC Prep: Forming an equation whose roots are alpha over beta and beta over alpha
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Final Revision: Checking a symmetric-function answer by solving the equation outright
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Learn: The degree of a polynomial and its leading coefficient
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Quiz: The factor theorem, and testing whether x minus a is a factor
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WAEC Prep: Sketching a cubic from its factorised form
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Final Revision: The zeros of a polynomial and where its graph cuts the x-axis
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Quiz: The product of the roots of a cubic
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Practice: Finding the third root of a cubic when two are known
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Explain Back: Forming a cubic equation whose three roots are given
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Show All Working: Three roots in arithmetic progression in a cubic
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Final Revision: Checking that the roots found satisfy the original equation
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