Given the function $f(x) = \frac{ax^2 + bx + c}{x - 2}$, we need to determine the values of $a$, $b$, and $c$ such that the curve (C) representing $f(x)$ satisfies the following conditions: * (C) passes through the point A(0, 5). * The tangent to (C) at point A is parallel to the x-axis. * The tangent to (C) at the point B with x-coordinate 1 has a slope of -3.
2025/4/3
1. Problem Description
Given the function , we need to determine the values of , , and such that the curve (C) representing satisfies the following conditions:
* (C) passes through the point A(0, 5).
* The tangent to (C) at point A is parallel to the x-axis.
* The tangent to (C) at the point B with x-coordinate 1 has a slope of -
3.
2. Solution Steps
* Condition 1: (C) passes through A(0, 5)
This means . Substituting into the function:
So, , which implies .
* Condition 2: The tangent at A(0, 5) is parallel to the x-axis.
This means . Let's find the derivative :
Now, we set :
This implies . Since , we have , which gives , so .
* Condition 3: The tangent at B(1, f(1)) has a slope of -
3. This means $f'(1) = -3$. We have $f'(x) = \frac{ax^2 - 4ax - 2b - c}{(x - 2)^2}$. Substituting $x = 1$, $b = 5$, and $c = -10$:
So, , which implies .
Therefore, , , and .
3. Final Answer
, ,