1,331 prompts matching "find the gradient of y = x^3 - 4x at the point where x = 2"
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Learn: Solving two simultaneous equations by Cramer's rule
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Quiz: Checking an inverse by multiplying to get the identity
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Practice: Why a 2 by 2 matrix with determinant nought cannot be inverted
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Quiz: Checking a 3 by 3 inverse by multiplication
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Spot My Mistake: Why the inverse must be applied on the correct side
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Learn: Inertia, and what mass actually measures
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Quiz: Recovering the original force from its two components
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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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Explain Back: The order in which the forces are drawn round the triangle
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Practice: Why the forces must sum to nought in two perpendicular directions
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Explain Back: A particle hanging from two strings set at different angles
I have just studied a particle hanging from two strings set at different angles in my SS3
Spot My Mistake: When Lami's theorem may be used, and when it may not
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Spot My Mistake: Why the probabilities in a distribution must sum to one
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Practice: Using a binomial expansion to approximate a number
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Explain Back: The binomial probability formula
I have just studied the binomial probability formula in my SS3 Further Mathematics class.
Spot My Mistake: Reading a probability from the standard normal table
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Learn: The unit vectors i, j and k
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Learn: Subtracting one vector from another
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Spot My Mistake: The equilibrium condition written in vector form
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