Math Problem Statement

Grafik fungsi y = ax^3 - 2x^2 + 2ax + m - 3 menyinggung sumbu x. Tentukan nilai m yang memenuhi.

Solution

The problem in the image is:

"Grafik fungsi y=ax32x2+2ax+m3y = ax^3 - 2x^2 + 2ax + m - 3 menyinggung sumbu xx. Tentukan nilai mm yang memenuhi."

Translation: "The graph of the function y=ax32x2+2ax+m3y = ax^3 - 2x^2 + 2ax + m - 3 touches the xx-axis. Determine the value of mm that satisfies this condition."

Solution:

If the graph of the function touches the xx-axis, it means the function has a double root (i.e., the discriminant must be zero at that point). We need to analyze when the cubic function has a root with multiplicity 2.

  1. Function: y=ax32x2+2ax+m3y = ax^3 - 2x^2 + 2ax + m - 3.
  2. Condition: The graph touches the xx-axis, so y=0y = 0 has a repeated root.

Let's proceed with the necessary steps:

  1. Find the derivative of yy: y=ddx(ax32x2+2ax+m3)=3ax24x+2ay' = \frac{d}{dx}(ax^3 - 2x^2 + 2ax + m - 3) = 3ax^2 - 4x + 2a

  2. **Condition for touching the xx-axis:

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Cubic Functions
Roots of Equations
Derivative
Tangent

Formulas

Derivative of a cubic function: y' = 3ax^2 - 4x + 2a
Touching the x-axis: requires double root

Theorems

Multiplicity of Roots

Suitable Grade Level

Grades 11-12