755 prompts matching "Using concurrence to find the direction of an unknown third force"
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Common Mistakes: Why a rational number added to an irrational one stays irrational
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Show All Working: Deciding whether two given surds are equal without a calculator
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Final Revision: Simplifying a fraction whose numerator and denominator are both surds
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Learn: Why a surd is never left in the denominator
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Final Revision: Expressing a rationalised answer in the form a root b over c
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Learn: The conjugate of a compound surd expression
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Show All Working: Finding a and b when a plus b root 2 equals a given surd
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Final Revision: A word problem that leads to an equation in surd form
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Spot My Mistake: Reading closure off an operation table
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Final Revision: Why closure is checked before any other property
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Learn: What it means for an operation to be commutative
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Final Revision: Why distributivity links two operations rather than one
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Worked Example: Finding the identity element from a rule such as a*b = a + b - 3
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Common Mistakes: Checking an inverse by working the operation both ways
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Learn: Reading index notation, the base and the exponent
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Worked Example: The law for multiplying powers of the same base
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Quiz: The law for dividing powers of the same base
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Common Mistakes: Why the index laws need the bases to match
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Final Revision: Converting an answer back out of index form
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Show All Working: A word problem that leads to an indicial equation
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