1,334 prompts matching "The zero product rule, and why it works"
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WAEC Prep: The inverse of a 3 by 3 matrix from its adjoint and its determinant
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Worked Example: Checking the solution of three equations by substitution
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WAEC Prep: The newton, and how it is defined
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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Worked Example: Using the sine rule on the triangle of forces
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WAEC Prep: Friction, and the direction in which it acts
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Worked Example: The moment of a force about a point on its own line of action
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WAEC Prep: The moment of two equal and opposite parallel forces
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Quiz: A rod resting against a wall, and the concurrence of its three forces
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Worked Example: Matching each force to the sine of the angle opposite it
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WAEC Prep: A random variable, and the values it may take
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WAEC Prep: Expanding p plus q, all to the power n, as a probability model
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WAEC Prep: The probabilities of nought, one and two successes read off an expansion
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Worked Example: The probability of no events at all in a Poisson distribution
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Quiz: The area under the normal curve, and what it represents
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WAEC Prep: The standard normal distribution, with mean nought and variance one
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WAEC Prep: The probability that a normal variable exceeds the mean by more than one standard deviation
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WAEC Prep: Finding the mean or the standard deviation from a given probability
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Worked Example: The continuity correction when approximating a discrete distribution
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Worked Example: Finding the unit vector in the direction of a given vector
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