1,045 prompts matching "Why the mean and the variance of a Poisson distribution are equal"
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Structured question: solve a quadratic inequality and state the range
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Explain back: completing the square when the coefficient of x squared is not one
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Worked Example: Substituting a, b and c into the quadratic formula correctly
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Explain Back: Leaving the roots of a quadratic in surd form
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Worked Example: The product of the roots as c over a
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Quiz: Finding the sum and the product without solving the equation
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WAEC Prep: Checking the sum and product against the solved roots
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Worked Example: The identity linking alpha squared plus beta squared to the sum and product
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Explain Back: The value of alpha minus beta, all squared
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Worked Example: Substituting into the quadratic and tidying up
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Worked Example: The degree of a polynomial in one variable
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Quiz: The leading term and the constant term
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WAEC Prep: The relation between the roots and the constant term
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Explain Back: The disjunction of two propositions
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WAEC Prep: The symbols used for and, or and not
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Quiz: Disjunction and the inclusive or
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Explain Back: The inverse of a conditional
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Explain Back: The rule of syllogism
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Worked Example: The number of ways n people sit round a round table
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Worked Example: Reading the coefficients of an expansion off Pascal's triangle
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