1,333 prompts matching "IGCSE Additional Maths Y11: The nCr key on the calculator — Teach Me"
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Final Revision: Deciding whether a set under an operation forms a group
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Practice: Rationalising a denominator of the form root a
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Explain Back: Rationalising a denominator of the form a plus root b using the conjugate
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Common Mistakes: Solving an equation in which the unknown sits under a root
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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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Show All Working: Solving a logarithmic equation and rejecting the invalid root
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Final Revision: Sketching the graph of a logarithmic function
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Practice: The condition for a quadratic equation to have equal roots
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Spot My Mistake: Forming a new equation whose roots are the reciprocals of the original
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WAEC Prep: Forming an equation whose roots are each two more than the original
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Show All Working: Finding a coefficient given a stated relation between the roots
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Common Mistakes: Symmetric functions when the three roots of a cubic are involved
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Final Revision: Checking a symmetric-function answer by solving the equation outright
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Final Revision: The zeros of a polynomial and where its graph cuts the x-axis
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Spot My Mistake: The relations between roots and coefficients for a quartic
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Final Revision: Checking that the roots found satisfy the original equation
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Learn: Solving a linear inequality, and reversing the sign on dividing by a negative
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Spot My Mistake: Showing the solution of an inequality on a number line
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Common Mistakes: The range of values of x for which an expression stays positive
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