1,042 prompts matching "Finding two unknown tensions from three forces in equilibrium"
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Common Mistakes: Simplifying a compound statement using the laws
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Explain Back: Showing that a statement is a contradiction
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Show All Working: The negation of a tautology
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Common Mistakes: Deciding between tautology, contradiction and contingency
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Explain Back: The rule of syllogism
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WAEC Prep: Testing an argument for validity by truth table
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Show All Working: The fallacy of affirming the consequent
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Common Mistakes: The fallacy of denying the antecedent
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Worked Example: Arranging r of n objects in a line
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Explain Back: Arrangements restricted at the first letter
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Show All Working: Arrangements of boys and girls alternately
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Common Mistakes: Arranging objects when some must stay in a fixed order
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Spot My Mistake: Arrangements round a table with men and women alternating
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Show All Working: A circular arrangement with one fixed seat such as the head
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Common Mistakes: Comparing a line arrangement with a circular one
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Worked Example: Selections in which the order does not matter
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Explain Back: A selection that must exclude one particular member
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Spot My Mistake: A selection with at least a stated number of one kind
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WAEC Prep: A selection with at most a stated number of one kind
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Show All Working: Selecting a committee with the chairman named separately
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