Question

The point (s) on the curve y³ + 3x² = 12y where the tangent is vertical is (are)

• A. $( \pm 4/\sqrt{3}, - 2)$
• B. $( \pm \sqrt{11/3},1)$
• C. (0, 0)
• D. $( \pm 4/\sqrt{3},2)$

Answer 1

Answer: (D)

$( \pm 4/\sqrt{3},2)$

Answer 2

Put $\frac{dx}{dy}$= 0