AP Calculus ABhardmcq1 pt
If x² + y² = 25, what is dy/dx?
A.-x/y
B.x/y
C.-y/x
D.2x/2y
Explanation
Core Concept
Correct. Differentiating implicitly: 2x + 2y(dy/dx) = 0, which gives dy/dx = -2x/(2y) = -x/y.
Correct Answer
A-x/y
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