AP Calculus BCmediummcq1 pt
A parametric curve's tangent is vertical where
A.dx/dt = 0 and dy/dt ≠ 0
B.dy/dt = 0
C.dx/dt = dy/dt
D.the curve is closed
Explanation
Core Concept
Vertical tangents need zero x-rate with nonzero y-rate.
Correct Answer
Adx/dt = 0 and dy/dt ≠ 0
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