1,334 prompts matching "Learn: The formula for the general term of an expansion"
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Worked Example: What a determinant of nought means for a 2 by 2 matrix
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Practice: The sign pattern of the cofactors in a 3 by 3 determinant
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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Spot My Mistake: The sum of the first n terms of an arithmetic progression
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Show all working: the determinant of a three by three matrix
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Show All Working: The half angle formulae and the t-substitution
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Spot my mistake: Treating the rth term of a binomial expansion as the one carrying the rth power
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Find the range of x for which y = x^3 - 3x is increasing
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WAEC Prep: The effect of a scalar on the determinant
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Learn: The distributive law for a scalar over a sum of matrices
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WAEC Prep: The determinant of a matrix with a row of noughts
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WAEC Prep: The determinant of the identity matrix
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WAEC Prep: The determinant of a 2 by 2 matrix as ad minus bc
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Explain Back: The determinant of a product as the product of the determinants
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WAEC Prep: The determinant of a 3 by 3 matrix with two equal rows
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Worked Example: Evaluating a 3 by 3 determinant by the rule of Sarrus
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WAEC Prep: Setting out the coefficient determinant for two simultaneous equations
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Spot My Mistake: Forming the determinant Dx by replacing the first column
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Worked Example: Forming the determinant Dy by replacing the second column
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WAEC Prep: The determinant Dz in a system of three unknowns
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