1,299 prompts matching "Rewriting an expression with only positive indices"
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Explain Back: Solving two simultaneous equations by multiplying by the inverse
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Worked Example: The units of mass, and the SI unit
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Practice: The value of g used in Nigerian examination papers
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Explain Back: The resultant of two forces acting in the same straight line
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Worked Example: The direction of the resultant of two forces
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Practice: The direction of the resultant of several coplanar forces
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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Explain Back: The forces acting on a body hanging from two strings
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Worked Example: Using the sine rule on the triangle of forces
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Explain Back: The order in which the forces are drawn round the triangle
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Explain Back: Why the total moment about any point must be nought
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Practice: Finding an unknown force from a closed polygon
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Practice: Limiting friction, and the greatest value it can reach
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Explain Back: The units of a moment, and why they are newton metres
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Explain Back: A particle hanging from two strings set at different angles
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Worked Example: Matching each force to the sine of the angle opposite it
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Explain Back: A probability distribution table for a discrete random variable
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Worked Example: Finding a particular term of a binomial expansion
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Practice: Using a binomial expansion to approximate a number
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Practice: The variance of a binomial distribution as npq
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