The equation of the tangent to the curve $y(x-2)(x-3) - x + 7 = 0$, at the point where it cuts the x-axis is
- A. - x + 20y = 7
- B. x + 20y = 7
- C. x - 20y = 7
- D. - x - 20y = 7
Answer: C. x - 20y = 7
Explanation: Cuts x-axis at y=0 -> -x+7=0 -> x=7. Point (7,0). Differentiate to find slope. Result is x - 20y = 7.