Question

The point at which the tangent to the curve \(y = x^3 - 3x^2 - 9x + 7\) is parallel to the x-axis is

• A. (1, 3)
• B. (1, -3)
• C. (3, -20)
• D. Both (B) and (C)

Hint:

For tangents parallel to the x-axis, the derivative is zero.
Always check if the points lie on the curve.

Answer 1

The Correct Option is D