Find the ascending area of the function
Find the ascending area of the function
To solve this problem, we first note that the function is expressed in vertex form as . The vertex form of a quadratic function is , where the vertex is located at . For our function, this vertex is at .
Since the coefficient of is positive, the parabola opens upwards. This means that the lowest point on the parabola is the vertex, making the axis of symmetry and the point at which the function changes from decreasing to increasing.
Thus, the function is increasing on the interval where . When is greater than 6, the value of increases as increases.
By examining the multiple-choice answers, we find that the choice that matches is the correct one. Therefore, the ascending area of the function is for .
Therefore, the solution to the problem is .
6 < x