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If y depends on u and u depends on x, the chain rule states that dy/dx equals
A(dy/du)(du/dx)
B(dy/du) / (du/dx)
Cdy/du - du/dx
Ddy/du + du/dx
Answer & Solution
Correct answer: A. (dy/du)(du/dx)
The rates of change of the linked variables multiply along the chain.
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