1,483 prompts matching "Telling an open statement from a closed one"
Worked example: Multiplying two numbers in base five
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Teach me: Why adding indices multiplies powers of the same base
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Practice set: The law for a power raised to a power
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Practice set: Equating the indices once the bases agree
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Practice set: Choosing the ratio that fits the information given
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Worked example: A two-step problem needing two ratios
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Practice set: Reading a value off a trigonometric graph
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Teach me: A logarithm as the index a base must be raised to
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Spot my mistake: The law for the logarithm of a quotient
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Worked example: Using the power law to simplify a logarithmic expression
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Spot my mistake: Finding a root with logarithms
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Worked example: The shape of a logarithmic graph
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Spot my mistake: Solving a simple congruence
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Worked example: Bringing a negative number into the right residue class
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Worked example: The number of elements in a set
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Teach me: All the members of two sets together
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Practice set: The difference of two sets
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Worked example: The formula for the number in a union
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Practice set: Joint variation with two variables
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Teach me: Recognising a quadratic expression
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